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Chronic hives are long-lasting raised, red, and itchy patches of skin. Hives usually have red borders and pale centres. They range in size from ½ centimetre to 8 centimetres (¼ inch to 3 inches) or more across. They may seem to move from place to place on the skin. Several hives may join to form a large area of raised, red skin.
When hives and swelling last more than 6 weeks even with treatment, they are called chronic.
Hives may occur with swelling under the skin. But you may have swelling without hives. Swelling may hurt a bit, but it does not usually itch like hives.
You cannot spread hives to other people.
Follow-up care is a key part of your treatment and safety. Be sure to make and go to all appointments, and call your doctor or nurse advice line (811 in most provinces and territories) if you are having problems. It's also a good idea to know your test results and keep a list of the medicines you take.
Give an epinephrine shot if:
After giving an epinephrine shot call 911, even if you feel better.
Call 911 if:
Call your doctor or nurse advice line now or seek immediate medical care if:
Watch closely for changes in your health, and be sure to contact your doctor or nurse advice line if:
Go to https://www.healthwise.net/patientEd
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Current as of: March 22, 2023
Author: Healthwise Staff
Medical Review:Adam Husney MD - Family Medicine & E. Gregory Thompson MD - Internal Medicine & Martin J. Gabica MD - Family Medicine
Care instructions adapted under license by your healthcare professional. If you have questions about a medical condition or this instruction, always ask your healthcare professional. Healthwise, Incorporated disclaims any warranty or liability for your use of this information.
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