Different Types of Sun Allergies: What to Know

Polymorphic light eruption often appears on sun-exposed skin after exposure, with itchy red bumps, patches, or small blisters. Other light reactions can be linked to a medicine, skincare product, or an underlying skin condition. The face, neck, arms, and upper chest may be involved, while covered skin is less affected. [Sun Sensitivity](/symptoms/sun-sensitivity/) describes the broader symptom and does not identify the cause by itself.

Move into shade, cover exposed skin with tightly woven clothing, and use sun protection that your skin tolerates. Pause a newly introduced fragranced product and review medicines with a clinician or pharmacist rather than stopping a prescribed medicine on your own. A clinician may suggest [Topical Corticosteroids](/treatments/medical-dermatology/topical-corticosteroids/) for inflammation. Recurrent reactions may be assessed for [Narrowband UVB Phototherapy](/treatments/medical-dermatology/narrowband-uvb-phototherapy/) under supervision.

Arrange an assessment for a first severe reaction, widespread blistering, facial swelling, eye symptoms, fever, or a rash that continues despite avoiding sunlight. Seek urgent help for breathing difficulty, swelling of the lips or tongue, faintness, or rapidly spreading hives. A clinician can also check whether a medicine or another skin condition is contributing.

Does the timing and distribution fit a sun-triggered reaction? Could a medicine or product be contributing? Which sun-protection measures and treatments are suitable for my skin?