Skin allergy from sunlight

Sunlight contains ultraviolet radiation, which can provoke an immune reaction in some people. Polymorphic light eruption is a common explanation for a recurring rash after a change in sun exposure. It may look like clusters of bumps, patches, or small blisters on the face, neck, arms, or chest. A medication or scented product can also make skin react to light. Because the appearance can resemble eczema, heat rash, or sunburn, note the delay between exposure and symptoms and whether covered areas are spared.

Avoid direct sunlight during an active episode and use shade, protective clothing, and a suitable sunscreen when outdoors. Wash gently, moisturise with a simple unperfumed product, and keep fingernails short to limit damage from scratching. Do not apply leftover prescription creams without checking their intended site and duration. If flares are frequent, a dermatologist may recommend topical corticosteroids for selected episodes or discuss narrowband UVB phototherapy as a monitored preventive approach.

Seek emergency care for difficulty breathing, swelling inside the mouth or throat, severe dizziness, or sudden widespread swelling. Contact a clinician promptly for fever, increasing warmth, pus, marked pain, extensive blistering, or involvement around the eyes. Make a planned appointment if the rash keeps returning, follows a new medicine, affects non-exposed skin, or does not settle after sun avoidance.

Ask what features distinguish light sensitivity from sunburn, eczema, or a product reaction. Discuss your medicines and skincare routine, the safest protection for your activities, and whether a treatment plan is needed before future sun exposure.