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A member asked:
I get hives all over my body everyday. what causes it?
3 doctors weighed in across 2 answers
You itch a lot: Mast cells release histamine. Histamine combines with receptors on capillary lining cells & sensory nerves adjacent to the mast cells. Nerve cells fire giving the sensation of itching. A nervous reflex stimulates the blood vessels to dilate increasing blood flow producing redness. Spaces open up between the capillary lining cells allowing plasma to leak out causing swelling.
Answered 10/23/2016
6.1k views
Hives:urticaria: I would suggest you to see an allergist. For now take antihistamines. Sometimes is difficult to find what causes it.
Answered 10/3/2016
6.1k views
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