Urticaria causes

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Causes

Many substances can trigger hives, including:

• Animal dander (especially cats)
• Insect bites
• Medications

• Acetylcysteine
• Dexamethasone
• Prednisone
• caspofungin acetate
• Doxycycline
• Doxycycline
• Hydrochlorothiazide
• Spironolactone
• Tolbutamide

• Pollen
• Shellfish, fish, nuts, eggs, milk, and other foods

Hives may also develop as a result of:

• Emotional stress
• Extreme cold or sun exposure
• Excessive perspiration
• Illness (including lupus, other autoimmune diseases, and leukemia)
• Infections such as mononucleosis