Photodermatitis, sometimes referred to as sun poisoning or photoallergy, is a form of allergic contact dermatitis in which the allergen must be activated by light to sensitize the allergic response, and to cause a rash or other systemic effects on subsequent exposure. It is distinct from sunburn.
光过敏包括一系列因阳光照射而引发或加重的症状、疾病和病症（光性皮肤病）。它可分为五类：primary photodermatosis、exogenous photodermatosis、photo‑exacerbated dermatoses、metabolic photodermatosis 和 genetic photodermatosis。 Photosensitivity refers to various symptoms, diseases, and conditions (photodermatoses) caused or exacerbated by exposure to sunlight. It is classified into five categories: primary photodermatosis, exogenous photodermatosis, photo-exacerbated dermatoses, metabolic photodermatosis, and genetic photodermatosis.
光敏性皮炎 (photosensitive dermatitis) 可能引起肿胀、呼吸困难、灼热感、红色且瘙痒的皮疹（有时呈小水泡状）以及皮肤脱屑。还可能出现斑点，瘙痒可持续较长时间。