10 doctors weighed in:

What are hives?

10 doctors weighed in
Dr. Maziar Rezvani
Internal Medicine - Allergy & Immunology
5 doctors agree

In brief: Skin rash

That is characteristically raised, evanscent, and itchy.

In brief: Skin rash

That is characteristically raised, evanscent, and itchy.
Dr. Maziar Rezvani
Dr. Maziar Rezvani
Thank
Dr. Eli Silver
Pediatrics
3 doctors agree

In brief: A vascular reaction

Hives are slightly elevated patches of skin caused by increased blood flow.
The hives are usually caused by histamine release, which dilates blood vessels and causes the resultant edema. The hives are usually surrounded by a red halo - a flare - which comes from a reactive skin flush. The irritated nerve endings in the vicinity of the hive will send off "itching" signals.

In brief: A vascular reaction

Hives are slightly elevated patches of skin caused by increased blood flow.
The hives are usually caused by histamine release, which dilates blood vessels and causes the resultant edema. The hives are usually surrounded by a red halo - a flare - which comes from a reactive skin flush. The irritated nerve endings in the vicinity of the hive will send off "itching" signals.
Dr. Eli Silver
Dr. Eli Silver
Thank
Dr. Stephen Pool
Emergency Medicine

In brief: Hives

Hives: http://www.
webmd.com/skin-problems-and-treatments/guide/hives-urticaria-angioedema#1

In brief: Hives

Hives: http://www.
webmd.com/skin-problems-and-treatments/guide/hives-urticaria-angioedema#1
Dr. Stephen Pool
Dr. Stephen Pool
Thank
Get help from a real doctor now
Dr. Christopher Crosby
Board Certified, Dermatology
13 years in practice
93K people helped
Continue
108,000 doctors available
Read more answers from doctors