Many causes: Possible causes: 1. Allergies to pollens, mold, dust, food, drugs and bee stings 2. Infections like hepatitis 3. Autoimmunity 4. Complement deficiency – acquired or hereditary 5. Vaculitis 6. Idiopathic – unknown cause – very common treatment may include antihistamines, steroids, h2 blockers and if very severe, cyclosporine.
Answered 10/23/2016
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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