<unk>  is a short-term, immune reaction occurring in the skin of humans that have been infected by water-borne trematode parasites. Symptoms, which include itchy, raised papules, commonly occur within hours of infection and do not generally last more than a week.
Swimmer's itch
Jock itch
Blister
Sunburn
Pellagra
Eczema
Prurigo
Xerotic eczema