#erythema  abnormal redness of the skin resulting from dilation of blood vessels (as in sunburn or inflammation)
  supertype:  erythroderma  any skin disorder involving abnormal redness
  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

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