Classification DIagram

Presentation

*Upper respiratory virus is the main trigger for acute urticaria in children.

• Acute: IgE-mediated swelling of the upper dermis
  • Trigger: URTI, Stress, Vaccine (Acute)
• Chronic: IgG-mediated
  • Trigger: Cold, Water, Sun, Dermatographia (Chronic)

Etiology (Acute, Type I)

• < 6w: Acute - Type I
• Infectious (MAIN in children)
  • Upper Resp Virus
  • Strep
  • helmeinthes
• Food
• IV administration (in hospital)
• Idiopathic

Etiology (Chronic, Type II)

• 6w: Chronic - Type II

• Infectious
  • HIV, hepatitis
• Physical
• Autoimmune
  • Associated with SLE - Lupus

Management