3 doctors weighed in:

What could cause hives on the stomach?

3 doctors weighed in
Dr. Corey Clay
Internal Medicine - Allergy & Immunology
2 doctors agree

In brief: Many things

Unfortunately, the location of hives offers little diagnostic information.
Assuming this is new for your, the most common cause is infection (often very minor in nature) resulting in activation of innate immune pathways in skin that trigger mast cells. Usually, hives resolve and we never know the cause. For other causes: http://emedicine.medscape.com/article/137362-overview#aw2aab6b2b3aa

In brief: Many things

Unfortunately, the location of hives offers little diagnostic information.
Assuming this is new for your, the most common cause is infection (often very minor in nature) resulting in activation of innate immune pathways in skin that trigger mast cells. Usually, hives resolve and we never know the cause. For other causes: http://emedicine.medscape.com/article/137362-overview#aw2aab6b2b3aa
Dr. Corey Clay
Dr. Corey Clay
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