Can I take isotretinoin in summer? Sun sensitivity, sunscreen and holidays
Yes. Isotretinoin can be prescribed at any time of year, but it commonly makes skin drier, more delicate and more sensitive to sunlight. You do not usually need to postpone treatment simply because it is summer. You do need a realistic plan to avoid intense ultraviolet (UV) exposure, prevent sunburn and protect your skin every day.
If you work outdoors or have a sunny holiday booked, tell your prescriber before starting. Do not stop, restart or change your dose for a holiday without medical advice.
Why is skin more sun-sensitive during isotretinoin treatment?
Isotretinoin reduces sebum and affects the outer skin layer. Dryness, peeling and fragility are common, and UK product information lists photosensitivity reactions. You may burn or become irritated more readily than before treatment.
The NHS and British Association of Dermatologists (BAD) advise avoiding too much sun, using protective clothing and applying sunscreen with an SPF of at least 30. Sunbeds and sunlamps should not be used.
What sunscreen should I use?
Choose a sunscreen that you can apply generously and tolerate on dry or acne-prone skin. Look for:
SPF 30 or higher for UVB protection
at least four-star UVA protection, or the UVA symbol in a circle
broad-spectrum protection
a non-comedogenic, fragrance-free formulation if your skin is easily irritated
water resistance when swimming or sweating.
Many people prefer SPF 50 or 50+, particularly on holiday or when the UV index is high. A higher number does not make longer exposure safe.
Apply sunscreen to all exposed skin, including the face, ears, neck, hairline and backs of the hands. The NHS advises applying it 30 minutes before going outside and again just before exposure. Reapply generously at least every two hours, and after swimming, sweating or towel drying. Use an SPF lip balm because dry, cracked lips are particularly common.
Sunscreen is only part of the plan
Do not rely on sunscreen alone. Check the UV index and use protection when it is 3 or above. In the UK, the sun is usually strongest between 11am and 3pm from March to October. On holiday, local UV levels may be much higher than the temperature suggests.
Practical protection includes:
seeking shade, especially around midday
wearing a wide-brimmed hat, sunglasses and closely woven clothing
planning outdoor activities for earlier or later in the day
avoiding deliberate tanning, sunbeds and sunlamps
keeping sunscreen accessible so that reapplication is not missed.
Cloud, wind or cool weather do not remove UV exposure. Water, sand and pale surfaces can also reflect UV, so beach and watersport days need particular care.
How should I plan a sunny holiday?
Discuss the trip with your prescribing team in advance, especially if it involves prolonged outdoor activity, very high UV levels or difficulty attending planned monitoring. Treatment decisions should be based on your acne, side effects and circumstances—not a general rule that isotretinoin must stop in summer.
Keep enough medicine in its original packaging. Storage instructions vary; some UK leaflets specify a maximum of 25°C or 30°C and protection from light and moisture. Follow your leaflet and avoid hot cars or direct sun.
Continue the dose exactly as prescribed. If pregnancy-prevention measures apply to you, make sure contraception, pregnancy testing and follow-up arrangements remain uninterrupted. Current UK isotretinoin safeguards still apply when travelling.
Keep the rest of your skincare simple
Heat, sweat, seawater and chlorinated pools can add to irritation. Use a gentle cleanser, a bland non-comedogenic moisturiser, lip balm and sunscreen. Rinse after swimming and pat rather than rub the skin dry.
Avoid scrubs and exfoliating brushes. Acids, topical retinoids and products containing benzoyl peroxide or salicylic acid may be too irritating unless your prescriber has specifically advised them. Our simple isotretinoin skincare routine explains how to manage dryness without overloading the skin.
Skin is also more fragile during treatment. Waxing, chemical peels and some laser procedures need separate precautions; read our guide to waxing, laser treatment and peels during isotretinoin.
What should I do if I get sunburnt?
Move out of the sun and keep the affected skin covered until it has healed. Cool the skin with a cool shower, bath or damp towel, drink fluids and use a simple unperfumed moisturiser. Do not apply ice directly, pick peeling skin or break blisters.
Ask NHS 111 or an urgent GP service for advice if the skin is badly swollen or blistered, or if you feel unwell, dizzy, feverish or dehydrated. Contact your isotretinoin team as well if the burn is significant. Do not alter the dose on your own.
Does this advice apply to darker skin tones?
Yes. All skin tones can burn and sustain UV damage. Redness may be less obvious in brown or black skin, so also look for unusual warmth, tenderness, tightness, swelling or later peeling. Sunscreen and shade remain important, and preventing inflammation may also reduce the chance of persistent dark marks.
When is isotretinoin considered for acne?
Isotretinoin is a prescription-only medicine generally reserved for severe acne that has not responded to adequate standard treatment, or acne at risk of permanent scarring. It is not suitable for everyone.
UK measures updated by the MHRA on 22 January 2026 require appropriate prescriber expertise, balanced risk information and ongoing monitoring. Mental health and sexual function must be assessed, and the Pregnancy Prevention Programme applies where pregnancy is possible. Sun protection is one part of a wider safety plan.
Frequently asked questions
Should I wait until autumn to start treatment?
Not automatically. Some people prefer cooler months, but the decision should reflect acne severity, scarring risk, travel and your ability to protect your skin. Discuss timing with the assessing clinician.
Is SPF 50 better than SPF 30?
SPF 50 provides greater UVB protection when used correctly, but neither replaces shade, clothing or regular reapplication. The minimum advised by the NHS and BAD during treatment is SPF 30.
Can I use a sunbed if I cover my face?
No. UK patient guidance says not to use sunbeds or sunlamps during isotretinoin treatment.
Do I need sunscreen on cloudy days?
Check the UV index rather than judging by brightness or temperature. Protect exposed skin when the index is 3 or above.
Taking the next step
If acne is persistent, painful, scarring or affecting your wellbeing, a structured assessment can review the diagnosis, treatments already tried and safe next options. You can use the mySkinDoc secure consultation form to submit your history and photographs. An assessment does not guarantee isotretinoin or any other prescription; recommendations depend on clinical suitability and current UK requirements.
