Sun Protection and Sunburn: Before, During and After

Reviewed August 11, 2026 by Sara, licensed pharmacist. This article is general education, not personal medical advice.

Most sun advice stops at “wear sunscreen”. The part people actually need is the other half: what to do on the day the plan fails, the skin is already pink, and it is six in the evening. This guide covers both — how I would protect skin through a normal summer, and what is worth doing in the first hours and days after a burn.

UV is not the same as heat

You can burn on a cool bright day, at altitude, near water, or under light cloud that makes the sun feel milder than it is. Temperature is what you feel; ultraviolet radiation is what damages the skin. The two often move together, which is exactly why a breezy day at sea catches people out.

The practical version: check the UV index rather than the thermometer when deciding how careful to be. It is in most weather apps, and it is the number that actually predicts how fast unprotected skin burns.

Sunscreen: what matters, and what does not

Choose broad-spectrum (UVA and UVB), SPF 30 or higher for everyday use, and water resistance if you will swim or sweat.

After that, the differences that change outcomes are not on the label:

Quantity. Sunscreen is tested at a thickness most people never apply. A thin, careful layer performs well below the SPF on the bottle.
Coverage. Ears, hairline and parting, back of the neck, hands, tops of feet, and the sides of the face are the places I see burned most often.
Reapplication. It rubs off on towels, seats and clothing, and dilutes with sweat and water. Follow the product instructions, and reapply after swimming or towel drying regardless of what the bottle promises.

The best sunscreen is the one that gets used generously and reapplied — not the most expensive formula in the drawer.

Protection works in layers

Layer	Why it helps	Common mistake
Shade and timing	Reduces UV exposure at the source	Staying out through peak hours because sunscreen is on.
Clothing and hat	Reliable — it does not depend on remembering to reapply	Forgetting ears, scalp and the back of the neck.
Sunglasses	Protects the eyes and the thin skin around them	Choosing a style with no real UV protection.
Sunscreen SPF 30+	Protects exposed skin that clothing cannot cover	Applying too little, or treating it as permission to stay out longer.
Barrier care	Keeps skin less reactive, dry and cracked	Stacking strong actives, then going out in the sun.

Sara explaining daily skin protection layers — Shade, timing, clothing, sunglasses, sunscreen and barrier care each cover a gap the others leave open.

Clothing and shade are the underrated half. A hat covers the scalp, ears and back of the neck — three of the easiest places to burn and the hardest to reapply to. Shade during the strongest hours does more than any product. And this is not only about sunbathing: a long city walk, lunch outside, a stadium, a boat trip or an outdoor shift can add up to more exposure than a deliberate beach day.

For babies and young children, keep direct strong sun off them as far as possible. For older children, the habits that actually survive a holiday are the simple ones: hat, shade breaks, a covering layer, and an adult applying the sunscreen.

Barrier care is part of sun protection

Harsh cleansing, frequent exfoliation, strong actives used too often, fragrance-heavy products and friction leave skin dry, tight and reactive. Irritated skin stings from products it normally tolerates, and it is less comfortable to protect.

A simple routine usually protects better than a complicated one: gentle cleansing, moisturiser when the skin needs it, sunscreen in the morning, and new actives introduced one at a time. If you use retinoids, acids or acne treatments, the same principle from my acne article applies here — more products do not mean better skin.

Dry, cracked skin is not only cosmetic. Cracks are painful and more vulnerable to further damage, so hands, lips and exposed areas deserve a suitable moisturiser and physical protection in cold wind or when cleaning.

Medicines that increase sun sensitivity

Some antibiotics, acne treatments, anti-inflammatory medicines, herbal products and topical actives can make skin react far more easily to sunlight. The size of the risk depends on the specific product, the dose and the person — which is why a general list is close to useless in practice.

If you start a new medicine before a holiday, an outdoor job or the start of summer, ask a pharmacist and bring the box, not the brand colour or a half-remembered name. In an Italian pharmacy this is a routine summer question: the pharmacist can check the supply category (OTC, SOP or prescription-only), whether the product is associated with photosensitivity, and whether sunscreen plus shade is enough or the plan needs stricter avoidance.

Supplements and herbal products belong in the same conversation. “Natural” does not mean inert — as in my supplements guide, what matters is the exact ingredient and dose, not the category on the front of the box.

When protection fails: the first hours

Sunburn peaks hours after the exposure, which is why it is consistently underestimated while you are still outside. Once skin is pink, tight, hot or sore, the day’s plan has already failed — the useful move is to stop exposure, not to add another layer and continue.

In the first hours:

Get into shade or indoors.
Cool the skin gently — a cool shower or a damp cloth. Not ice directly on skin.
Apply a plain, fragrance-free moisturiser or after-sun that feels comfortable. Nothing with alcohol, perfume, acids, retinoids or scrub particles.
Drink fluids, and be careful with alcohol if you are already dehydrated.
Wear loose, soft clothing over the area.

The first evening is the time to be deliberately boring with skincare. Whatever active routine you were using, the burned area is not the place to continue it.

Reading the severity

What you see or feel	What it suggests	What I would do
Pink, warm, tender skin	Mild sunburn	Cool gently, moisturise, hydrate, no further sun.
Painful red skin over a large area	More significant burn	Rest, fluids, suitable pain relief if appropriate, watch it closely.
Blisters	Deeper skin damage	Do not open them; ask for advice if large, widespread or very painful.
Fever, chills, dizziness, confusion	Heat illness may be involved	Seek medical advice urgently.
Spreading redness, warmth, pus, swelling	Possible infection	Get it assessed.

Pain relief such as paracetamol or ibuprofen suits many people, but the right choice depends on other medicines and medical history — follow the leaflet for the product you actually have, and ask a pharmacist or doctor in pregnancy, or with stomach, kidney, heart or blood-thinning medicines.

Blisters should be left intact: the skin over them protects the tissue underneath. Keep the area clean, avoid friction, and get advice if the blisters are large, widespread or very painful. Peeling later is normal — moisturise, let it shed, and keep it covered. Newly healed skin marks more easily and burns faster, so for the following weeks clothing beats trusting sunscreen alone on that area.

Sara discussing sunscreen and daily skin care — After a burn, the priority is barrier support and coverage — not the active routine you were using before.

When to ask for help

For a burn, seek advice if it is extensive, very painful or blistering, or if there is fever, chills, nausea, dizziness, confusion, fainting or dehydration. Ask sooner for babies and young children, older adults, people with a weakened immune system, and anyone on medicines that increase sun sensitivity. Increasing redness, swelling, warmth or pus around a blistered area needs assessment for infection.

Separately from burns, get a doctor or dermatologist to look at any mole or lesion that changes in size, shape, colour or border, or that bleeds, crusts, itches or does not heal. That is a different question from sunburn care, and it is not one to resolve with products at home.

In Italy: a pharmacist can help with after-sun care, pain-relief suitability and photosensitivity checks. A medico di base or continuità assistenziale is the right level for a large, blistering or worsening burn. Call 112 for fainting, confusion, severe dehydration or anyone who seems seriously unwell after heat and sun.

Frequently asked questions

Is SPF 30 enough for everyday use?

SPF 30 or higher is a sensible everyday baseline, but the amount applied, reapplication, shade and clothing change the result. Sunscreen is one layer, not the whole plan.

Which medicines can increase sun sensitivity?

Some antibiotics, acne treatments, anti-inflammatory medicines, herbal products and topical actives can increase sun sensitivity. The risk depends on the exact product, dose and person, so bring the box to the pharmacy rather than the brand name.

What is the first thing to do for sunburn?

Get out of the sun, cool the skin gently, drink fluids and protect the area from further exposure. Do not put ice directly on the skin, and stop acids, retinoids and scrubs on the burned area.

Should I pop sunburn blisters?

No. The skin over a blister protects the damaged tissue underneath, so opening it increases irritation and infection risk.

When does sunburn need medical advice?

Seek advice for extensive, very painful or blistering sunburn, and for fever, chills, nausea, dizziness, confusion, fainting, dehydration or symptoms that keep worsening.