Skincare SPF Guide: How to Choose and Apply Sunscreen Properly

For reliable sun protection, choose a sunscreen with at least SPF 30 and strong UVA protection. In the UK, look for four or five UVA stars or the letters UVA inside a circle. Apply it generously to exposed skin and reapply regularly, particularly after swimming, sweating or towel drying.

Sunscreen is an important part of a skincare routine, but it should not be your only protection. Shade, suitable clothing, a wide-brimmed hat and UV-protective sunglasses also help reduce exposure when the sun is strong.

What does SPF mean?

SPF stands for sun protection factor. It indicates the level of protection a sunscreen provides against ultraviolet B radiation, usually shortened to UVB.

UVB is strongly associated with sunburn and contributes to skin damage and skin cancer.

The SPF number does not tell you how many hours you can safely remain in the sun. The protection you receive also depends on:

How much sunscreen you apply
Whether you cover every exposed area
How often you reapply it
Whether it rubs or washes away
The strength of the sun
Your skin’s sensitivity to sunlight
Whether you also use shade and clothing

No sunscreen provides complete protection. A high SPF should not be used as permission to remain in strong sunlight for longer.

What is the difference between UVA and UVB?

Sunlight contains different forms of ultraviolet radiation. UVA and UVB are the two types most relevant to everyday sun protection.

UVA radiation

UVA can contribute to:

Premature skin ageing
Changes in pigmentation
Long-term skin damage
Skin cancer risk

UVA can be present even when the weather does not feel especially hot. It can also pass through ordinary window glass more readily than UVB.

SPF alone does not describe UVA protection.

UVB radiation

UVB is a major cause of sunburn and also contributes to skin cancer.

Its strength varies according to factors such as:

Time of day
Season
Location
Altitude
Cloud cover
Reflection from water, snow and sand

A sunscreen should protect against both UVA and UVB rather than focusing on SPF alone.

What SPF should you use?

The NHS recommends choosing sunscreen with:

SPF 30 or higher for UVB protection
At least four-star UVA protection

A UVA symbol inside a circle indicates that the product meets the relevant European standard for UVA protection.

SPF 50 provides a higher level of UVB protection than SPF 30, but neither blocks all ultraviolet radiation.

You may prefer SPF 50 if:

Your skin burns easily
You have very fair skin
You have a condition that increases light sensitivity
You take medication that increases sun sensitivity
You have a history of skin cancer
You have been advised to use it by a healthcare professional
You are spending prolonged time outdoors
You are visiting a location with intense sunlight
You find that you do not always apply enough product

The most useful sunscreen is one that provides suitable protection and that you are willing to apply generously and regularly.

Is SPF 30 enough?

SPF 30 is the minimum level generally recommended by the NHS and Cancer Research UK for sun protection in the UK. It should also offer strong UVA protection.

SPF 30 can be a suitable choice when it is applied correctly and combined with other protective measures. However, the protection shown on the bottle is based on controlled testing. Applying a thin layer may provide less protection than the label suggests.

SPF 50 can offer a little more margin for imperfect application, but it still needs to be applied generously and reapplied.

What does the UVA star rating mean?

The UK UVA star system usually ranges from one to five stars. A higher number of stars indicates stronger UVA protection relative to the product’s UVB protection.

For everyday use, look for:

Four UVA stars
Five UVA stars
A UVA symbol inside a circle

The UVA circle indicates that the product meets a recognised European requirement for UVA protection. Do not choose sunscreen by SPF alone. A high SPF product with inadequate UVA protection does not provide the balanced coverage you should be looking for.

What does broad spectrum mean?

Broad-spectrum sunscreen is designed to protect against both UVA and UVB radiation. You may see this description on products sold internationally. In the UK, the UVA star rating or UVA circle provides more specific information about UVA protection.

Check the full label rather than relying on one phrase at the front of the bottle.

What is the UV index?

The UV index describes the strength of ultraviolet radiation from the sun at a particular place and time. A higher number means a greater risk of skin and eye damage.

In the UK, sun protection should be considered when the UV index reaches 3 or above. You can check the forecast through a reliable weather service.

The UV index can be high even when:

The air feels cool
The sky is partly cloudy
There is a breeze
You are not visibly tanning
You do not feel your skin burning

Heat and ultraviolet radiation are not the same thing. A cool day can still have enough UV to damage unprotected skin.

Do you need sunscreen every day?

Daily facial sunscreen can be a useful habit, particularly during months when ultraviolet levels are high enough to cause skin damage.

Cancer Research UK notes that the sun can be strong enough to cause skin damage in the UK from around mid-March to mid-October.

Your need for sun protection depends on:

The UV index
How long you will be outdoors
The time of day
Your skin sensitivity
Your location
Whether you use medicines or treatments that increase sensitivity
How much skin is exposed

You may choose to apply facial sunscreen routinely because this is easier than judging your exposure every morning. Sunscreen is still relevant on cloudy days because ultraviolet radiation can pass through cloud.

Do you need sunscreen in winter?

You may still need sunscreen during winter, particularly if:

The UV index is 3 or above
You spend a long time outdoors
You are at high altitude
You are around snow, which can reflect ultraviolet radiation
You use light-sensitising treatments
A healthcare professional has advised year-round protection
You have melasma or another pigmentation concern affected by sunlight

UV levels are often lower during a typical UK winter, but they are not always absent. Use the UV index and your personal circumstances to guide your routine.

Do you need sunscreen indoors?

You may consider sunscreen indoors if you spend a substantial amount of time beside a bright window, particularly if you are concerned about UVA exposure or have been advised to maintain strict sun protection.

Ordinary windows block much of the UVB associated with sunburn, but some UVA can pass through glass. You do not necessarily need to apply sunscreen for an entire day spent away from windows. Your actual exposure matters.

Do you need sunscreen when it is cloudy?

Yes, you may still need sunscreen when the UV index indicates that protection is required. Clouds do not block all ultraviolet radiation. You can still burn or experience skin damage on an overcast day.

Check the UV forecast rather than deciding based only on how bright or hot the day feels.

Chemical and mineral sunscreen

Sunscreens are often described as chemical, mineral or hybrid. These labels refer to the ultraviolet filters used in the formula.

Chemical sunscreen

Chemical sunscreens use organic ultraviolet filters. They often have:

Lightweight textures
Transparent finishes
Easy spreadability
Less visible white residue

Some formulas may sting sensitive skin or eyes, although this depends on the individual product and person.

Mineral sunscreen

Mineral sunscreens use filters such as zinc oxide or titanium dioxide. They may suit people who prefer mineral filters or whose skin reacts to certain other sunscreen ingredients.

Possible disadvantages include:

A visible white or grey cast
Thicker texture
Greater tendency to gather in facial hair
A dry or heavy finish

Tinted mineral sunscreens can reduce visible white residue on some skin tones.

Hybrid sunscreen

Hybrid formulas combine different types of ultraviolet filters. They may offer a balance between cosmetic elegance, strong protection and comfortable wear.

No category is automatically best. The protection rating, application and suitability for your skin matter more than choosing sunscreen based on a broad marketing label.

How to choose sunscreen for your skin type

A suitable texture can make regular application much easier.

Sunscreen for oily skin

Look for descriptions such as:

Lightweight
Oil-free
Non-comedogenic
Gel
Fluid
Matte
Dry touch
Suitable for oily skin

A fluid or gel sunscreen may feel more comfortable than a rich cream. Allow it to settle before applying makeup. If your face becomes shiny, use a small amount of powder after the sunscreen has formed an even layer.

Do not apply less sunscreen to avoid shine. Choose a texture you can use in the required amount.

Sunscreen for dry skin

Dry skin may prefer:

Cream sunscreen
Hydrating sunscreen
Moisturising sunscreen
Fragrance-free formulas
Products containing glycerin or other moisturising ingredients

You can apply moisturiser before sunscreen if the sunscreen alone does not feel comfortable. Allow each layer to settle. Too many rich products applied quickly may pill or make makeup slide.

Sunscreen for combination skin

A lightweight lotion or fluid often provides a useful balance. Apply moisturiser only where needed, then follow with sunscreen across the exposed face and neck.

You may prefer to:

Use less moisturiser through the oily centre
Add more hydration to dry cheeks
Set the forehead, nose and chin with powder
Leave dry areas less powdered

The sunscreen layer itself should remain even.

Sunscreen for sensitive skin

Choose a simple formula and introduce it carefully.

Look for:

Fragrance-free sunscreen
Products labelled for sensitive skin
Mineral formulas if preferred
Alcohol-free options if alcohol irritates your skin
Products intended for the face
Formulas designed for sensitive eyes

Marketing terms do not guarantee that a product cannot cause a reaction. Patch testing may help identify obvious irritation, although it cannot predict every response.

Stop using the product if you develop persistent burning, significant itching, swelling or a rash.

Sunscreen for acne-prone skin

Look for:

Non-comedogenic sunscreen
Oil-free formulas
Lightweight fluids
Gel creams
Fragrance-free options
Products suitable for acne-prone skin

Non-comedogenic means the formula is intended to be less likely to block pores. It does not guarantee that no one will develop spots.

Introduce one sunscreen at a time. This makes it easier to identify the cause if your skin becomes irritated or congested. A sunscreen you can wear consistently is more useful than one with a beautiful ingredient list that feels uncomfortable.

Sunscreen for mature skin

Mature skin may be dry, oily, sensitive or combination, so choose according to your actual skin type. Hydrating creams and lotions may feel comfortable on dry skin. Lightweight fluids can work well if you prefer less shine.

Tinted sunscreen may help even the appearance of the complexion, while an ordinary sunscreen can be layered beneath foundation. Sunscreen cannot reverse existing skin ageing, but reducing further ultraviolet exposure may help limit additional sun damage.

Sunscreen for darker skin tones

Every skin tone can be damaged by ultraviolet radiation. People with deeper skin tones may be less likely to burn quickly, but they can still experience sun damage, pigmentation changes and skin cancer.

Look for formulas that blend without leaving an unwanted white, purple or grey cast.

Options may include:

Clear sunscreen fluids
Invisible gels
Tinted mineral sunscreen
Hybrid formulas
Sunscreens available in several tint shades

Test the product in daylight and allow it to settle before judging the finish. A tinted product should still provide the stated protection when applied in the required amount.

How much sunscreen should you apply?

Sunscreen needs to be applied generously.

The NHS advises adults to use approximately:

Two teaspoons for the head, arms and neck
Two tablespoons for the whole body while wearing a swimming costume

Apply enough to cover exposed skin evenly.

For the face, neck and ears, many people use the two-finger method as a practical guide. This involves applying lines of sunscreen along two fingers. However, the correct amount varies with the product, finger size and area covered.

Follow the manufacturer’s instructions and make sure you do not miss:

Hairline
Ears
Sides of the face
Jaw
Neck
Eyelids, if the product is suitable
Around the nose
Lips, using a suitable lip SPF

A thin, barely visible layer may not provide the protection shown on the label.

How to apply facial sunscreen properly

Step 1. Complete your morning skincare

Cleanse your skin if needed, then apply any serum or moisturiser you use. Allow the products to settle before sunscreen.

Step 2. Apply enough sunscreen

Distribute sunscreen across the:

Forehead
Cheeks
Nose
Chin
Jaw
Ears
Neck

Add more if your upper chest is exposed.

Step 3. Spread it evenly

Use gentle movements to create a continuous layer. Avoid rubbing for so long that the sunscreen begins to roll away. Check around the hairline, eyebrows and sides of the nose.

Step 4. Allow it to settle

Follow the application timing on the product label before going outside. Allowing the product to dry can also make makeup application easier.

Step 5. Apply makeup carefully

Press or blend makeup over the sunscreen without aggressively disturbing the layer beneath it. Use thin layers of foundation and avoid repeatedly rubbing the same area.

When should sunscreen be applied?

Sunscreen should be the final step of your morning skincare routine and should normally be applied before makeup.

A simple routine might be:

Cleanser
Serum or treatment
Moisturiser
Sunscreen
Makeup

Follow the instructions on your sunscreen regarding how long before sun exposure it should be applied. Many sun safety sources recommend applying it before going outdoors, then reapplying regularly.

Does sunscreen go before or after moisturiser?

Apply moisturiser first, then sunscreen. Sunscreen should form an even layer over your finished skincare routine. Allow moisturiser to absorb so the sunscreen does not mix unevenly or pill.

You may not need a separate moisturiser if your sunscreen is moisturising enough for your skin.

Does sunscreen go before or after makeup?

Sunscreen goes before makeup. Apply it after skincare, let it settle, then add primer or makeup if desired.

Foundation, concealer and powder should not replace sunscreen unless a product is specifically tested and labelled for sun protection and is applied in the required amount. Most people do not apply enough foundation to achieve the SPF printed on its packaging.

Can you mix sunscreen with moisturiser or foundation?

It is better not to mix sunscreen with another product unless the manufacturer specifically instructs you to do so.

Mixing may:

Dilute the sunscreen
Create uneven coverage
Change how the protective film forms
Make it difficult to know how much protection you are receiving

Apply moisturiser first, then sunscreen as a separate layer. Apply foundation after the sunscreen has settled.

How often should you reapply sunscreen?

Reapply sunscreen regularly during sun exposure. Many health authorities advise reapplying around every two hours and sooner after:

Swimming
Heavy sweating
Towel drying
Rubbing the skin
Activities that remove the product

Even products labelled water-resistant or once daily may need topping up after wear, swimming or friction. The exact timing may vary according to the product instructions and your activity.

How do you reapply sunscreen over makeup?

Reapplication over makeup can feel awkward, but protection should take priority during meaningful sun exposure.

Possible methods include:

Gently pressing sunscreen lotion over makeup with clean fingers
Using a clean makeup sponge to press sunscreen onto the skin
Choosing a lightweight sunscreen fluid
Removing and reapplying makeup if you need reliable coverage
Using a tinted sunscreen as the refreshed base

Sunscreen sprays, mists, sticks and powders can be convenient, but it may be difficult to apply enough of them evenly. Use them according to the label and do not assume a light mist provides the same coverage as a generous lotion application.

For prolonged outdoor exposure, a full and even reapplication is more reliable than a small cosmetic touch-up.

Is once-a-day sunscreen enough?

Do not assume that a product remains fully protective all day under every condition.

Sunscreen can be affected by:

Sweat
Swimming
Towels
Clothing
Touching the face
Movement
Uneven initial application

Follow the label, but reapply if the sunscreen may have been removed.

Is water-resistant sunscreen waterproof?

No sunscreen should be treated as permanently waterproof. Water-resistant products are tested to retain a stated level of protection during limited water exposure. Swimming, sweating and towel drying can still reduce the protective layer.

Reapply after leaving the water and after drying yourself.

Does SPF in foundation provide enough protection?

Makeup containing SPF provides some protection when applied correctly, but most people use much less foundation than the amount required to achieve its labelled SPF.

For dependable protection, use a dedicated sunscreen underneath your makeup.

The British Association of Dermatologists notes that moisturiser and makeup containing SPF are better than no protection, but recommends high-SPF sunscreen for prolonged sun exposure.

Is moisturiser with SPF enough?

A moisturiser with SPF can provide protection if:

It has suitable SPF and UVA protection
It is applied evenly
You use enough
You cover every exposed area
You reapply when needed

In practice, people often apply moisturiser more thinly and may miss areas such as the ears and sides of the face. A dedicated sunscreen may be easier to apply in the amount needed, especially before prolonged outdoor exposure.

Does sunscreen prevent tanning?

Sunscreen reduces the ultraviolet radiation reaching your skin, but no sunscreen blocks all UV.

You may still tan while wearing sunscreen, particularly if:

You apply too little
You miss areas
You do not reapply
The product rubs away
You remain in strong sunlight for a long time

A tan is a sign that the skin has responded to ultraviolet exposure. It should not be treated as evidence of healthy or protected skin.

Can you still get sunburn while wearing SPF 50?

Yes.

Possible reasons include:

Applying too little
Missing part of the skin
Failing to reapply
Swimming or sweating
Towel drying
Using an expired product
Remaining in strong sun for too long
Relying on sunscreen without clothing or shade

SPF 50 offers high protection, but it is not a complete physical barrier.

Does sunscreen expire?

Yes. Check the expiry date and the period-after-opening symbol on the packaging.

Replace sunscreen if:

It has expired
The texture has separated unexpectedly
The smell has changed
The colour has changed
The packaging is damaged
It has been stored in excessive heat
You cannot tell how old it is

Do not rely on an old bottle that has spent long periods in a hot car or direct sunlight. Store sunscreen according to the manufacturer’s instructions.

Can sunscreen cause spots?

A sunscreen may contribute to breakouts in some people, but this varies.

Try:

A lightweight fluid
A gel sunscreen
A non-comedogenic formula
An oil-free product
A fragrance-free option
Removing it thoroughly in the evening

Introduce one new product at a time. Breakouts can also be influenced by hormones, skincare, makeup, hair products, stress and medication.

Why does sunscreen sting your eyes?

Sunscreen may move into the eyes through sweat, facial movement or application too close to the lash line.

You could try:

A sunscreen designed for sensitive eyes
A mineral formula around the eye area
Allowing the product to set before makeup
Avoiding application inside the orbital area unless the product is suitable
Wearing sunglasses and a hat
Using less rich skincare beneath sunscreen

Do not reduce protection on exposed skin without replacing it with another suitable method.

If sunscreen enters your eye, rinse gently with clean water. Seek advice if pain, redness or blurred vision continues.

Why does sunscreen leave a white cast?

A white or grey cast may be caused by the ultraviolet filters, pigment or powder within the formula. It is more noticeable on medium and deep skin tones.

Try:

A tinted sunscreen
A transparent fluid
A hybrid formula
A product tested across diverse skin tones
Applying it in sections while still using the full amount
Allowing the sunscreen to settle before judging the finish

Do not apply less product simply to reduce the cast, as this may reduce protection.

Why does sunscreen pill?

Pilling occurs when products roll into small flakes or balls.

Possible causes include:

Applying too many skincare layers
Using too much moisturiser
Not allowing products to settle
Repeated rubbing
Applying makeup too quickly
Incompatible film-forming textures
Dry or flaky skin beneath the products

Try simplifying your routine and reducing the amount of each product except the sunscreen. Apply sunscreen gently, allow it to settle, then press makeup over it rather than rubbing.

Is sunscreen safe for sensitive or reactive skin?

Many people with sensitive skin can find a suitable sunscreen, but it may require some testing.

Start with a fragrance-free product designed for sensitive skin. Patch test it on a limited area and introduce it when your skin is otherwise calm.

Stop using the product if you experience:

Persistent burning
Significant itching
Swelling
Blistering
A worsening rash

Speak to a pharmacist, GP or dermatologist if reactions continue.

Is sunscreen safe during pregnancy?

Sunscreen is generally an important part of protecting exposed skin during pregnancy, particularly because some people notice increased pigmentation.

If you have concerns about a specific ingredient or product, ask a pharmacist, midwife or GP for individual advice. Choose a reputable product, follow its instructions and combine it with shade and protective clothing.

Sun protection for babies and children

Babies and children need particular care in strong sunlight.

Keep babies under six months out of direct strong sunlight as much as possible. Use shade and suitable clothing.

For older babies and children:

Use shade
Cover exposed skin with suitable clothing
Use a wide-brimmed hat
Protect the eyes with suitable sunglasses
Apply sunscreen to exposed areas
Reapply after water play, sweating and towel drying

Choose a product suitable for the child’s age and follow the label. Ask a pharmacist, health visitor or GP if a child has eczema, allergies or a previous sunscreen reaction.

Sunscreen is not the only form of sun protection

Do not rely on sunscreen alone.

When the sun is strong:

Spend time in the shade
Cover your shoulders
Wear loose clothing
Use a wide-brimmed hat
Wear UV-protective sunglasses
Avoid remaining outdoors for longer because you applied sunscreen
Reapply sunscreen to exposed areas

In the UK, ultraviolet radiation is generally strongest around the middle of the day. NHS and Cancer Research UK guidance recommends extra care between approximately 11am and 3pm when the sun is strong.

Common sunscreen mistakes

Applying too little

A thin layer may provide less protection than the SPF shown on the bottle. Apply generously and evenly.

Missing exposed areas

Commonly forgotten areas include:

Ears
Hairline
Neck
Upper chest
Hands
Tops of the feet
Around clothing straps
Scalp where hair is thin

Forgetting to reapply

Sunscreen can wear away through water, sweat and friction. Top it up regularly during exposure.

Relying on makeup SPF

Foundation is rarely applied in a thick enough layer to act as your only sunscreen. Use dedicated sun protection underneath.

Using sunscreen to stay outside longer

Sunscreen reduces exposure but does not make prolonged strong sunlight risk-free. Use shade and clothing too.

Judging ultraviolet levels by temperature

Cool and windy conditions can still have a high UV index. Check the forecast.

Mixing sunscreen with another product

This may create uneven coverage or dilute the formula. Apply it as a separate layer.

Using an expired bottle

Old sunscreen may no longer perform as intended. Check the date and condition of the product.

Skipping sunscreen on darker skin

Every skin tone can experience ultraviolet damage. Choose a formula that blends well and use it correctly.

When to get professional help

Speak to a pharmacist, GP or dermatologist if sunscreen repeatedly causes significant irritation, burning, swelling, blistering or a persistent rash.

Seek medical advice about a new or changing mole, a mark that bleeds or itches, or a sore that does not heal.

Contact NHS 111 or seek medical advice if sunburn causes severe blistering, marked swelling, dizziness, vomiting, fever or signs of dehydration.

Seek urgent medical help if a product reaction causes difficulty breathing or swelling of the lips, mouth, tongue or throat.