3 doctors weighed in:
How exactly do you get hives?
3 doctors weighed in

Dr. Steven Machtinger
Internal Medicine - Allergy & Immunology
1 doctor agrees
In brief: An allergic reaction
Hives occur when mast cells release histamine.
Histamine makes nearby nerve endings fire causing the sensation of itching & iincreasing blood flow causing redness. Small veins leak plasma (the liquid part of blood) causing local edema - that's the white bump. Hives lasting 6 weeks or less are usually caused by a virus or an allergic reaction to a food, medication, insect bite or sting.

In brief: An allergic reaction
Hives occur when mast cells release histamine.
Histamine makes nearby nerve endings fire causing the sensation of itching & iincreasing blood flow causing redness. Small veins leak plasma (the liquid part of blood) causing local edema - that's the white bump. Hives lasting 6 weeks or less are usually caused by a virus or an allergic reaction to a food, medication, insect bite or sting.
Dr. Steven Machtinger
Dr. Steven Machtinger
Thank
Dr. Monica Vasudev
Internal Medicine - Allergy & Immunology
In brief: Many Reasons
Hives which are short lived or chronic are common and can occur for many reasons.
A common reason for short-lived hives are infections. It may also occur as an allergic reaction. It may or may not occur with swelling. If hives are chronic, a reason is usually not found but it can occur with autoimmune conditions.

In brief: Many Reasons
Hives which are short lived or chronic are common and can occur for many reasons.
A common reason for short-lived hives are infections. It may also occur as an allergic reaction. It may or may not occur with swelling. If hives are chronic, a reason is usually not found but it can occur with autoimmune conditions.
Dr. Monica Vasudev
Dr. Monica Vasudev
Thank
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