What should you know about chronic photosensitivity?

Affected skin may become red, itchy, burning, swollen, scaly, or blistered after sunlight or another bright-light source. The reaction can be limited to exposed areas such as the face, neck, forearms, and backs of the hands, although patterns vary. Some medicines and topical products can make skin more light-reactive; a Drug Rash is one possibility that a clinician may consider. Timing, shape, and where the rash appears help guide assessment.

Limit direct light during the hours when it is strongest, use closely woven clothing, a broad-brimmed hat, shade, and a broad-spectrum sunscreen that suits your skin. Reapply sunscreen as directed on its label, especially after sweating or washing. Keep a list of medicines and skin products, and do not stop a prescribed medicine without medical advice. A Sun Sensitivity review can help identify triggers and a suitable plan.

Arrange an appointment if reactions recur, last beyond expected healing, occur after brief exposure, or leave persistent colour change or scarring. Seek urgent care for widespread blistering, facial swelling, trouble breathing, faintness, fever with a rapidly spreading rash, or painful involvement of the eyes or mouth. Bring photographs taken during a flare and the timing of every medicine or product change.

Could a medicine or product be increasing my light sensitivity? Does the rash pattern fit a Drug Rash or another skin condition? What protection is appropriate, and should any testing or medication review be arranged?