It is not a fixed drug eruption, it is a fixed “sunlight” eruption

Hyperpigmented fixed eruption is a phenomenon usually related with drug antigens, and known as fixed drug eruption. A woman had a skin condition with clinical and histopathologic indications of fixed drug eruption. The disease first appeared when she went to a swimming pool and left with hyperpigmented macules. Previously affected skin reactivated on three other occasions when she again visited swimming pools. Sunlight involvement (UVA‐UVB) was demonstrated through phototests. Sunlight should be considered as a cause of fixed drug‐like eruption and a possible cause of some cases of FDE without any apparent etiological factor.