FAQ: What can cause hives?

Can hives be a sign of something serious?

Hives appear as a rapidly spreading, red, raised and itchy rash in splotches or all over the body. Caused by an allergic reaction to medications or food, hives can be a sign of a life-threatening problem when accompanied by difficulty breathing and a drop in blood pressure.

What can cause sudden hives?

Common triggers of sudden-onset hives

  • Certain foods. Common foods that lead to an allergic reaction of hives include citrus fruits, milk, eggs, peanuts, and shellfish.
  • Insect bites and stings. Most insect stings and bites come from wasps, yellow jackets, hornets, and honeybees.
  • Animals.
  • Pollen.
  • Heat or cold temperature exposure.

Can hives occur for no reason?

They’re often caused by an allergic reaction to a food or drug. Usually, they go away quickly. For a small number of people, though, hives come back again and again, with no known cause. When new outbreaks happen almost every day for 6 weeks or more, it’s called chronic idiopathic urticaria (CIU).

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What’s the most common cause of hives?

The most common cause of hives is infections. Foods such as eggs, nuts and shellfish are common causes of urticaria. Medications such as aspirin and antibiotics (especially penicillin and sulfa) also are common causes of hives. Infections causing hives include the common cold, and other viral infections.

Why would someone break out in hives for no reason?

The most common causes are certain foods, medications, or infections. Insect bites and internal disease may also be responsible. The most common foods that cause hives are nuts, chocolate, fish, tomatoes, eggs, fresh berries, and milk. Fresh foods cause hives more often than cooked foods.

What do stress hives look like?

Stress rashes often appear as raised red bumps called hives. They can affect any part of the body, but often a stress rash is on the face, neck, chest or arms. Hives may range from tiny dots to large welts and may form in clusters. They may be itchy or cause a burning or tingling sensation.

Does Benadryl help hives?

Treatments Doctors Use for Hives

Doctors usually prescribe antihistamines as a first course of treatment for hives. Acute cases can generally be treated with over-the-counter antihistamines like Benadryl, Claritin (loratadine), Allegra (fexofenadine), and Zyrtec (cetirizine).

How do you calm hives?

If you’re experiencing mild hives or angioedema, these tips may help relieve your symptoms:

  1. Avoid triggers.
  2. Use an over-the-counter anti-itch drug.
  3. Apply cold washcloth.
  4. Take a comfortably cool bath.
  5. Wear loose, smooth-textured cotton clothing.
  6. Avoid the sun.

How long does it take for hives to disappear?

Hives usually go away on their own within a few days to a week. But for some, hives become a chronic, or long-term, issue. If you develop hives and they last longer than six weeks, you may have a condition known as chronic hives.

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Do hives spread by scratching?

Don’t Scratch

Yes, the itch can drive you crazy, but scratching hives may cause them to spread and become even more inflamed, says Neeta Ogden, MD, an allergist in private practice in Englewood, New Jersey, and a spokesperson for the Asthma and Allergy Foundation of America.

When should you see a doctor for hives?

When to see a doctor

See your doctor if your symptoms continue for more than a few days. If you think your hives or angioedema were caused by a known allergy to food or a medication, your symptoms may be an early sign of an anaphylactic reaction.

What kind of viral infection causes hives?

Some infections that can cause hives in children include respiratory viruses (common cold), strep throat, urinary tract infections, hepatitis, infectious mononucleosis (mono) and many other viral infections.

Can a virus cause hives?

A variety of viruses can cause hives (even routine cold viruses). The hives seem to appear as the immune system begins to clear the infection, sometimes one week or more after the illness begins. The hives usually persist for one week or two and then disappear.

What gets rid of hives fast?

A cold compress can be used as often as necessary.

  1. Bathing in an anti-itch solution. Oatmeal and baking soda baths can soothe skin and reduce irritation.
  2. Applying aloe vera. The healing properties of aloe vera may soothe and reduce hives.
  3. Avoiding irritants.

Why do hives get worse at night?

Hives and itching often worsen at night because that’s when the body’s natural anti-itch chemicals are at their lowest.

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