The diagnosis is mainly clinical. Skin biopsies of the site show necrosis caused by ischemia. Radiographic imaging may help to delineate the extent of the wound.
Livedoid dermatitis
Essential dermatitis
Molluscum dermatitis
Blister beetle dermatitis
Actinic prurigo
Phototoxic tar dermatitis
Lacquer dermatitis
Alopecia mucinosa