What should you know about extremely sensitive to light?

Sunlight or strong indoor light may cause stinging, warmth, redness, itching, tightness, or a visible rash. The reaction can affect exposed areas such as the face, ears, neck, and hands. Rosacea, atopic dermatitis, and perioral dermatitis can make facial skin more reactive, while a new medicine or skincare product may also increase sensitivity. Light sensitivity is not a diagnosis by itself; the timing, distribution, and appearance of the reaction help a clinician identify the cause.

Reduce direct sun exposure, seek shade, and use a wide-brimmed hat, sunglasses, and closely woven clothing. Introduce only one new skincare product at a time, and stop products that cause burning or a new rash. Choose a gentle, fragrance-free cleanser and moisturiser, and test sunscreen on a small area before applying it more widely. Note when symptoms begin, how long they last, and any recent medicine, supplement, cosmetic, or treatment changes. Read more about Sensitive Skin, Rosacea, and Atopic Dermatitis.

Arrange prompt medical advice for a reaction that is spreading, repeatedly triggered, blistering, painful, or not settling after you avoid the suspected trigger. Seek urgent help for facial swelling, trouble breathing, faintness, extensive blistering, or eye pain and vision changes. A clinician may examine the rash and review medicines, skincare, and other symptoms before recommending treatment.

Could a medicine, cosmetic, or skin condition be causing this reaction? Does the pattern fit rosacea, atopic dermatitis, or perioral dermatitis? Which sunscreen and cleanser are suitable for my skin? Should I have an eye examination or further testing?