Pyotraumatic Dermatitis

  • Also called acute moist dermatitis or 'hot spot'
  • Common in dogs, especially self-inflicted due to pain and itching
  • Usual causes: allergies, irritants, matted hair, parasites
  • Lesions tend to be worse in hot and humid weather
  • Grossly:
    • Hairless, red and moist lesion
    • Fluid exudate
    • Edges are circumscribed and red
  • Microscopically:
    • Superficial erosive to ulcerative exudative dermatitis
    • May be deeper suppurative folliculitis


Pyotraumatic Dermatitis Learning Resources
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