Hives might also be caused by circumstances besides allergies. It’s not uncommon for people to experience hives as the result of stress, tight clothes, exercise, illnesses, or infections.

It’s also possible to develop hives as the result of excessive exposure to hot or cold temperatures or from irritation due to excessive sweating. Because there are several potential triggers, many times the actual cause of hives can’t be determined.

Who is at risk?

People who are known to have allergies are more likely to get hives. You may also be at risk of developing hives if you’re taking medication or if you’re unknowingly exposed to things you may be allergic to, such as food or pollen. If you’re already ill with an infection or a health condition, you may be more vulnerable to developing hives.

Symptoms

Symptoms of chronic hives include:

– Batches of welts, called weals, that can arise anywhere on the body.
– Welts that might be red, purple or skin-colored, depending on your skin color.
– Welts that vary in size, change shape, and appear and fade repeatedly.
– Itchiness, also called pruritus, which can be intense.
– Painful swelling, called angioedema, around the eyes, cheeks or lips.
– Flares triggered by heat, exercise or stress.
– Symptoms that persist for more than six weeks and recur often and anytime, sometimes for months or years.

Finding relief: Treatment options

The first step in getting treatment is to figure out if you actually have hives. In most cases, a doctor will be able to determine if you have hives from a physical exam. Your skin will show signs of the welts that are linked with hives.

A doctor may also perform blood tests or skin tests to find out what may have caused your hives — especially if your hives were the result of an allergic reaction.

You may not need prescription treatment if you’re experiencing a mild case of hives not related to allergies or other health conditions. In these circumstances, a doctor might suggest that you find temporary relief by:

taking antihistaminesTrusted Source, such as diphenhydramine (Benadryl) or – cetirizine (Zyrtec)
avoiding irritating the area
avoiding hot water, which may aggravate the hives
taking a cool or lukewarm bath with colloidal oatmeal or baking soda
Seek emergency medical care
See a healthcare professional if you have severe hives or hives that last for more than a few days.

Chronic hives do not put you at sudden risk of a serious allergic reaction, called anaphylaxis. If you get hives as part of a severe allergic reaction, seek emergency care. Symptoms of anaphylaxis include dizziness, trouble breathing, and swelling of the tongue, lips, mouth or throat.