Hives, medically known as urticaria, are common rashes that anyone can get at any point in their lives. They can happen only once in your life, keep happening often, or stay longer (chronic) for more than 6 weeks.
- Citrus fruits
- Tree nuts
- Medications (antibiotics, Aspirin, Ibuprofen)
- Insect bites
- Insect stings
- Skin/fur of animals
- Pollen grains
Other less common causes of hives include:
- Common cold
- Bacterial or fungal infection
- Thyroid problem
- Sunlight (solar urticaria)
- Exposure to heat
- Exposure to cold (cold urticaria)
- Pressure on the skin
- Chemical contact
- Scratching the skin
How fast hives can appear depends on the trigger. Most of the time, they appear within minutes to a few hours of exposure to the trigger. Some medications may even take days or years to give rise to hives.
What do hives look like?
- Hives may look like big bug bites that can last from minutes to months.
- They can be red or skin-colored bumps or wheals that usually appear suddenly and go away just as quickly.
- Hives can appear anywhere on the body.
- They may be as small as the tip of a pen to as big as a dish plate.
- They can change their shape and place where they appear.
- They disappear and reappear over short periods.
- On pressing them, they blanch, which means their redness disappears temporarily.
How are hives diagnosed?
The doctor usually diagnoses hives by looking at your skin. They will take your medical history and check for any possible triggers. Finding the cause of chronic hives can be difficult. The following tests can help in identifying the cause:
How to get rid of hives fast?
An oral pill of an antihistamine medicine is the most common treatment and the first line of therapy to get rid of mild to moderate hives fast. They are very effective in relieving itchy skin. Your doctor may prescribe you a combination of a few antihistamines if you do not get relief from one.
If you have developed hives for the first time (acute hives), you may just receive a single dose of the medicine. If you suffer from chronic hives, you may have to take this medicine once daily for several days to prevent the hives from coming back.
Other medicines that dermatologists prescribe to treat hives include:
- Corticosteroids: These are given for severe hives and only for the short term.
- Epinephrine (adrenaline): This is an emergency medicine that is given as an injectable when swelling (angioedema) of the face, lips, tongue, or throat also develops along with the hives.
Chronic hives are commonly treated with:
- Antihistamine: Usually higher doses of antihistamines are given.
- Dapsone (antibiotic): This medication effectively reduces the swelling and redness of hives.
- Omalizumab (monoclonal antibodies): If antihistamines do not work, injections of omalizumab are given under the skin. This drug works by reducing the sensitivity to allergens.
Latest Allergies News
Daily Health News
How do you stop getting hives?
Chronic hives disturb your work, sleep, and other activities. Avoiding known triggers is the most important and effective way to stop getting them. You can take allergy tests to identify the hidden triggers.
Here are some other ways that can help you:
When should I go to the doctor for hives?
You need to visit the doctor right away if
- There is swelling of the face, tongue, or throat (angioedema).
- You face breathing trouble.
- Over the counter antihistamines fail to relieve the hives within 24 hours.
If hives come on and off for more than 6 weeks, schedule an appointment with your doctor who will evaluate you thoroughly and prescribe the right combination of medicines.
Health Solutions From Our Sponsors
Urticaria. Available at: https://emedicine.medscape.com/article/762917-overview
Top What Is Causing My Hives? Related Articles
Allergies QuizWhat are the causes of allergies? This online quiz challenges your knowledge of common food and household allergens, environmental triggers, allergic diseases and conditions, and allergy symptoms and treatments.
Allergy (Allergies)An allergy refers to a misguided reaction by our immune system in response to bodily contact with certain foreign substances. When these allergens come in contact with the body, it causes the immune system to develop an allergic reaction in people who are allergic to it. It is estimated that 50 million North Americans are affected by allergic conditions. The parts of the body that are prone to react to allergies include the eyes, nose, lungs, skin, and stomach. Common allergic disorders include hay fever, asthma, allergic eyes, allergic eczema, hives, and allergic shock.
Are Hives (Urticaria) Contagious?Hives are not contagious are triggered by an allergic response to a substance. Symptoms and signs of hives include a raised, itchy red rash on the skin. An individual should seek medical care for hives if he or she develops dysphagia, wheezing, shortness of breath, or throat tightening.
Eye Allergies PictureSevere allergic eye symptoms can be very distressing and are a common reason for visits to the allergist or ophthalmologist. See a picture of Eye Allergies and learn more about the health topic.
Hives (Urticaria & Angioedema)Hives, also called urticaria, is a raised, itchy area of skin that is usually a sign of an allergic reaction. The allergy may be to food or medications, but usually the cause of the allergy (the allergen) is unknown.
Ways to Reduce Mold AllergiesWebMD shows you 10 ways to fight the fungus and reduce mold allergy symptoms from dust masks to bottles of bleach.
Pets & AllergiesHow do you control and relieve pet allergies? How do you prevent pet allergies? Learn dog and cat allergy symptoms, the cause of allergies to cats and dogs, how to clean up for pet allergies, and the truth about hypoallergenic dogs and cats. Discover how to treat symptoms of pet allergies.