Polymorphous light eruption (PLE) is a common skin condition that occurs in response to sunlight exposure. It typically affects individuals who are sensitive to ultraviolet (UV) light, leading to a rash that can appear as red bumps, blisters, or patches. Symptoms usually develop within hours or days after sun exposure and can last for several days. The exact cause of PLE is not fully understood, but it is believed to involve an immune response to UV radiation. Treatment often includes avoiding sun exposure, using sunscreen, and applying topical corticosteroids to reduce inflammation. UV radiation and sunscreen are key factors in managing this condition.