Rashes, hives, and angioedema are common allergic reactions, with hives alone affecting about 20% of all people at some point during their lifetimes. Whether your skin reaction appears as red, itchy bumps, oozing sores, or swollen patches, Laura Ispas, MD, of Allergy Asthma & Immunology Institute, gets to the cause and develops individualized treatment to help prevent future outbreaks. To get relief from allergic skin reactions, call the office in Leesburg, Virginia, or book an appointment online.
Hives, also called urticaria, are red, itchy bumps on your skin. You can develop welts of different sizes, and your symptoms may range from mild to severe.
Although most cases of hives run their course and disappear, you can develop chronic hives. Patients with chronic hives have welts that appear daily for more than six weeks. Each welt disappears within 24 hours.
Hives often resemble a bug bite or a generic skin rash. However, hives also have specific characteristics that make them different from other skin problems:
Hives can develop anywhere on your body, and they’re often associated with angioedema.
Hives most often develop when you have an allergic reaction, but they also appear during some illnesses, especially if you have a fever. A few of the most common triggers include:
You may also develop hives due to a physical trigger. For example, hives often appear when you scratch or rub your skin. Other physical triggers include cold, heat, pressure, sun exposure, or high body temperature.
The most common allergic skin conditions include:
Eczema occurs in about one in 50 adults and affects one in five infants, with about 60% of cases appearing before the age of one year. It causes red, itchy skin that may be swollen and have a bumpy rash, blisters that ooze, or dry patches of thickened skin.
Eczema may be triggered by many different allergens and irritants, from pollen and food to soap, skin care products, and cigarette smoke.
Contact dermatitis occurs when an allergen comes into contact with your skin, making it appear red, bumpy, scaly, itchy, or swollen. Common contact allergens include poison ivy and poison oak, nickel, latex, and wool.
Angioedema refers to swelling that develops when fluid builds up in deep layers of your skin. The swelling and redness caused by angioedema appears in large, thick patches that are often warm or painful. Although angioedema often appears on your face, it may develop in your throat, hands, and feet.
The most common causes of angioedema include:
About 90% of all cases of angioedema develop in response to an allergy. Hives and allergic angioedema typically occur together.
Angiotensin-converting enzyme inhibitors (ACE inhibitors) are used to treat high blood pressure. They cause about 4-8% of all cases of angioedema.
The first step is to identify the exact cause of your rash, hives, or angioedema. Dr. Ispas performs a skin prick test or a patch test to see which allergens trigger a reaction. Then she works with each patient to develop an individualized treatment plan, based on the cause and severity of your symptoms.
In some cases, avoiding the trigger may be enough to prevent future skin outbreaks. You may also need medication to relieve symptoms or allergy shots to desensitize your immune system and diminish allergic reactions.
If you develop an allergic skin rash or hives, call Allergy Asthma & Immunology Institute for an evaluation. If your symptoms are severe, emergency appointments are available.