#erythroderma  any skin disorder involving abnormal redness
  supertype:  #skin_disease__disease_of_the_skin__skin_disorder__skin_problem__skin_condition  a disease affecting the skin
  subtype:  #erythema  abnormal redness of the skin resulting from dilation of blood vessels (as in sunburn or inflammation)
     subtype:  #erythema_multiforme  a red rash caused by hypersensitivity to a drug or disease or other allergen
     subtype:  #erythema_nodosum  skin condition characterized by tender red nodules on the shins and legs
        subtype:  #erythema_nodosum_leprosum__ENL  an inflammatory complication of leprosy that results in painful skin lesions on the arms and legs and face
     subtype:  #hickey__love_bite  a temporary red mark on a person's skin resulting from kissing or sucking by their lover
     subtype:  #erythema_solare__sunburn  redness of the skin caused by exposure to the rays of the sun
     subtype:  #windburn  redness and irritation of the skin caused by exposure to high-velocity wind
  subtype:  #flare.erythroderma  reddening of the skin spreading outward from a focus of infection or irritation

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