Pictures to help identify hives from other rashes

hives, also known as hives hives, is a rash with raised, red, itchy bumps or welts. Urticaria is a common disorder that affects up to 20% of the population at one or more times.

Hives can affect anyone of any age on any part of the body during any season of the year. They can be as big as a pen tip or as big as a dinner plate. Hives can also cause a tingling or burning sensation. Itching is usually worse at night and can interfere with sleep.

In this photo gallery, you will see several types of hives and the important characteristics of each type. This article will also explain why different hives occur and what you can do to treat them.

hives from infection

hives often idiopathicmeaning they can develop spontaneously with no known cause.

If a cause can be found, it is usually the result of a reaction to one of the following:

  • Allergic reaction to food, medication, or insect bites
  • bacterial or viral infections, including strep throat, colds, and mononucleosis
  • Physical triggers such as low temperature, pressure, scratches or vibration
  • sweating events, such as exercising or being in an environment that is too hot
  • psychological pressure
  • sun exposure (uncommon)
  • water exposure (uncommon)

This photo is an example of hives caused by a viral infection. Hives caused by an infection tend to be general (extensive) rather than localized (as can happen with things like bug bites).


Common causes of hives include allergies and infections. Certain physical triggers, such as extreme cold, vibration, or exercise, can also cause hives. Less common causes include sun or water exposure.

Causes and risk factors for hives

chronic urticaria

Hives can usually be diagnosed based on their appearance. hives may be acute, which means they develop rapidly and tend to resolve quickly.they may also be chronicmeaning they persist for more than six weeks and/or recur frequently over months or years.

Chronic urticaria is usually idiopathic and develops spontaneously with no apparent cause. It is thought that some kind of autoimmune disease may be involved.

Chronic urticaria can also be inducible, meaning known triggers cause them. One such example is hives that develop after tightening your belt or clothing, called pressure urticaria.

People with chronic urticaria often also have atopic (allergy-related) conditions such as asthma, atopic dermatitis (eczema) and allergic rhinitis (hay fever).

Chronic hives tend to cause mottled welts, as shown, with raised edges and well-defined borders.


Chronic urticaria is hives that last for more than six weeks and/or recur frequently over months or years. Most cases of chronic urticaria are idiopathic (source unknown).

How to Cope with Chronic Urticaria

acute urticaria

Acute hives are common and often harmless, and most clear up within a day without leaving any lasting marks. Here is a picture of acute urticaria.

Your doctor may prescribe an oral antihistamine to help relieve itching, or recommend simple home remedies to help ease discomfort. Fortunately, most cases resolve themselves.

This does not mean that all cases of acute urticaria are harmless.If hives appear suddenly and are accompanied by shortness of breath, wheezing, and swelling of the face or tongue, this can be a sign of a potentially life-threatening systemic allergy called allergic reaction.

Other signs of an allergic reaction include dizziness, irregular heartbeat, and a feeling that bad luck is imminent. 911 emergency assistance is required.


Call 911 if acute hives are accompanied by shortness of breath, wheezing, dizziness, irregular heartbeat, and swelling of the face or tongue. These are all signs of a medical emergency called an anaphylaxis.

How to Treat Hives

Spongiform urticaria

Hives are caused when the immune system reacts abnormally to certain physical, environmental, or even psychological triggers.

When this happens, the immune system will instruct immune cells in the skin (called mast cells) and immune cells in the blood (called mast cells) basophils) open and release inflammatory chemicals, including histamineinto the body.

Histamine causes tiny blood vessels in the skin to widen so that larger immune cells can enter the presumed injury site. The enlargement causes fluid to leak into the surrounding tissue, causing the raised red welt we identify as hives.

Depending on the amount of fluid released, hives can look very “spongy.” Alternatively, they can appear flat with well-defined raised bezels.


Hives are mainly due to the release of a chemical called histamine by the immune system. Histamine causes the blood vessels in the skin to widen and seep fluid into the surrounding tissue, which can lead to raised, itchy hives.


When people mention hives, they usually think of an allergic reaction to a food or medication. However, hives can also be caused by physical stimuli that cause raised red welts to form on the skin.

An example is Dermatology. Skin disease is a chronic hives caused by pressure touching the skin. The term “dermatology” literally means the ability to write on the skin.

The skin disease is one of the most common forms of urticaria, affecting 2 to 5 percent of the world’s population. Even so, the exact reason for this is largely unknown.

Similar conditions include hives from cold, hives from stress, hives from exercise, and hives from stress.


Physical irritation can trigger hives in some people. The reasons for this are largely unknown. Triggers may include cold, stress, exercise, stress, or scratching (called dermatoses).


Hives (hives) is a rash that causes raised, red, itchy bumps or welts. Hives can be acute, appear quickly, and usually resolve quickly on their own. Alternatively, they may be chronic, lasting more than six months and/or often recur over months or years.

There are many possible causes of hives, including allergies, infections, stress, colds, vibration, exercise, and even scratching. Chronic urticaria is usually idiopathic, of unknown origin, and may develop spontaneously for no apparent reason.

Hives are ultimately caused by an abnormal immune response in which inflammatory chemicals, including histamine, are released into the blood and tissues. Antihistamines can be used to relieve the swelling, redness, or itching of hives. Many cases resolve on their own without treatment.

Frequently Asked Questions

  • Can emotional stress cause hives?

    Yes. Histamine can cause puffy, red, raised sores called hives. When we’re under stress, the sympathetic nervous system floods out histamine — the same chemical that causes allergic reactions.

    understand more:

    What is stress urticaria?

  • What is the difference between rash and hives?

    A rash is an umbrella term for red, itchy, and irritated skin. Hives are a rash that causes raised, red, and often itchy bumps.

  • How long will hives last?

    If left untreated, hives can persist for several days. Taking an oral antihistamine, such as Benedryl, or a topical treatment can help hives go away faster. You can also use a cold compress to relieve itching.