Dandelion Chronic Hives & Swelling
When hives keep coming back, there may be more to investigate.
Our allergists assess and treat recurrent hives, itching and swelling.
What are hives?
Hives, also called urticaria, are raised, itchy areas of skin that can appear suddenly and disappear again. They may change shape, move around the body and come and go.
Swelling deeper under the skin is called angioedema and can occur together with hives.
What are chronic hives?
Hives are considered chronic when they continue or repeatedly return for more than six weeks.
One important thing patients often do not realize is that chronic hives are usually not caused by a food allergy. In many patients, no external allergen can be identified. Some cases appear to involve the body's own immune system.
What will the allergist look for?
We may review:
- When the hives started
- How long individual hives last
- Swelling
- Medications
- Recent illnesses
- Physical triggers
- Heat or cold
- Pressure
- Exercise
- Other medical conditions
- Photographs of previous outbreaks
Testing is ordered when the history suggests that it would be helpful.
How are chronic hives treated?
Treatment depends on severity and the individual patient. Options may include:
- Non-drowsy antihistamines
- Adjusting antihistamine doses
- Identifying and avoiding aggravating factors
- Additional medications when hives remain uncontrolled
- Biologic treatment in appropriate patients
Antihistamines remain a main treatment for chronic urticaria.
When is it an emergency?
Hives by themselves are generally not dangerous. However, difficulty breathing, throat swelling, faintness or other symptoms of anaphylaxis require immediate emergency treatment: call 911.
Getting an assessment
The clinic is also currently enrolling a chronic hives study; you can ask about it in the chat.
Assessments are by referral, and patients cannot book directly. Ask your family doctor, walk-in clinic, or another healthcare provider to fax a referral to 416 850 9993. Our team reviews it and contacts you to arrange the appointment.
If you are unsure whether this service applies to you, you are welcome to ask us a question first.