What are the signs and symptoms of solar urticaria (photosensitivity or sun/UV allergy)?

Doctor's Answers (1)

Solar urticaria is a type of urticaria or hives which is triggered by exposure of the skin to sunlight or UV light. It is an uncommon condition.

The rash of solar urticaria is the same as the rash of common urticaria or hives, presenting with itchy red wheals over the sun-exposed areas. The rash usually occurs shortly after sun exposure and settles with minutes or hours when away from the sun. In a study looking at solar urticaria in patients from Singapore, it was found that the triggering wavelength was most commonly by the visible light and UVA radiation spectrum. 

Treatment of solar urticaria includes sun protection and avoidance. Oral antihistamines are effective in controlling the rashes and hives. In some cases, phototherapy can be used to 'toughen' the skin to sunlight,  to increase to skin's tolerance to sun exposure.

Health on the Net Foundation

This site complies with the {0=HONcode standard for trustworthy health} information: {1=verify here}.

© 2020 DoctorxDentist PTE LTD. All rights reserved.

All content posted is for general informational purposes only and is not a substitute for professional medical advice. This Q&A is not a patient consultation and any information provided herein is not intended to replace consultation with a qualified medical professional. If you think you may have a medical emergency, call your doctor immediately. Always seek the advice of your doctor before starting or changing treatment.

Quote RequestWhatsapp