A member asked:

What causes rashes/hives?

5 doctors weighed in across 2 answers
Dr. Lynne Weixel answered

Specializes in Clinical Psychology

Immune system alert: For some reason (often it is mysterious even with best efforts to identify the agent) some people's immune systems go into an emergency alert mode and send out defensive weapons to protect you from what it feels as a threat. Unfortunately, it usually is an over-reaction and causes more problems for you. If your dr agrees - a daily benedryl may help. Be ready with an epi-pin & 911 for emergency!

Answered 12/29/2022

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Dr. John Chiu answered

Many causes: Depends on whether it is short-lived or chronic. If it is under 6 weeks duration , they can be caused by food or drug allergy and even a viral infection. If it lasts over 6 weeks, it gets more complicated although about 30% of the chronic cases are considered the result of an autoimmune disorder. It is not uncommon that no cause could be found despite exhaustive studies.

Answered 8/23/2013

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