Skin Allergy treatments at the Laser + Skin Institute
What are hives?
The most common signs (what you see) of hives are:
- Slightly raised, pink or red swellings on the skin.
- Welts that occur alone or in a group, or connect over a large area.
- Skin swelling that subsides or goes away within 24 hours at one spot but may appear at another spot.
As for symptoms (what you feel), hives usually itch. They sometimes sting or hurt. Some people always get hives in the same spot or spots on their body. These people often have a trigger (what causes the hives).
Every time they are exposed to that trigger, they get hives. Your dermatologist may call this type of hives fixed, which means not moving. Fixed hives may happen when a person takes a certain medicine (fixed drug eruption) or gets too much sunlight (fixed solar urticaria).
Who Gets hives?
Hives are common. Anyone can get them.
What are the causes of hives?
An allergic reaction can trigger hives.
|Common Triggers of Hives:
- Foods: Fruits (especially citrus fruits), milk, eggs, peanuts, tree nuts, and shellfish
- Insect bites and stings
- Touching something to which you are allergic, such as latex
- Allergy shots
|Other Common Triggers of Hives could be:
- Infections, including colds and infections caused by some bacteria or fungi
- Some illnesses, including a type of vasculitis, lupus, and thyroid disease
- Exposure to sun (solar urticaria), heat, cold, or water
- Pressure on the skin, such as from sitting too long
- Contact with chemicals
- Scratching the skin
Hives can happen within minutes of exposure to the trigger. Or you can have a delayed reaction of more than two hours.
Diagnosis, Treatment and Outcome
How do dermatologists diagnose hives?
When a patient has hives on the skin, a dermatologist can often make the diagnosis by looking at the skin. Finding the cause of hives, however, can sometimes be hard. This is especially true for hives that have been around for more than six weeks.
To find out what is causing your hives, your dermatologist will review your health history, ask questions, and do a physical exam. You may need the following tests:
- Allergy tests (on the skin or blood tests)
- Blood work (to rule out an illness or infection)
- A skin biopsy To perform a skin biopsy, the dermatologist removes a small piece of affected skin so that it can be examined under a microscope.
How do dermatologists treat hives?
For a mild or moderate case of hives, the most common treatment is a non-sedating (does not cause drowsiness) antihistamine. Antihistamines relieve symptoms like itching.
If you have chronic hives, your dermatologist may prescribe an antihistamine. You should take this medicine every day to prevent hives from forming. There are many antihistamines on the market. Some make you drowsy, and some do not. No one antihistamine works for everyone. Your dermatologist may combine an antihistamine with other medicines to control the hives.
Other medicines that are prescribed to treat hives include:
- Cortisones (for short-term use only because of side effects with long-term use)
- Dapsone, an antibacterial
- Other medicines that fight inflammation (redness and swelling)
Ask your dermatologist about possible side effects (health problems that can result from the medicines). For some cases of hives or angioedema, you may need an injection of epinephrine (shot of adrenaline).
A few people have chronic hives (lasting more than six weeks). Sometimes chronic hives go away on their own — often within a year. For others, hives can come and go for months or years. Children may outgrow the allergies that cause their hives.
For most people, hives are not serious. In some people, though, hives may be a sign of an internal disease. Others can get a severe swelling with hives known as angioedema. If you have hives and trouble breathing or swallowing, get emergency care right away.
Tips for managing hives
When hives are mild, you may not need treatment. You can often relieve the itching by placing cool cloths on the hives, or by taking cool showers.
If you have a bad allergic reaction, like shortness of breath, talk to your doctor about a prescription medicine called an “auto-injector.” This medicine stops the allergic reaction when you inject it into your thigh. Follow your doctor’s advice on how to use this medicine.
What should I do if I suspect I have Hives?
To schedule an appointment with our Physicians, Call our scheduling staff at: 973-635-5050