What Causes Hives and Swelling?

Hives, also known as urticaria, are a skin disease that causes itchy and inflamed red welts on the skin and can sometimes lead to difficulty breathing. While the cause of hives is not entirely understood, several things trigger the welt-like appearance on the skin. What Causes Hives and Swelling? This article will discuss common causes of this uncomfortable itching condition as well as treatment options.

Did you know that hives and swelling can be caused by many different substances? This site is going to provide you with a list of things that cause hives, swellings, and rashes.

What Causes Hives and Swelling?

Hives and swelling are symptoms of an allergic reaction in the body. In this article, we’ll discuss what causes hives and swelling, how they’re treated, and how you can avoid them.


There are many potential causes of hives and swelling, but the most common ones include:

  • Medications (antibiotics, aspirin, ibuprofen)
  • Food allergies (peanuts, shellfish)
  • Insect bites/stings (bees, wasps)

Hives, also known as urticaria, are raised welts on the skin that appear and disappear within a few hours. They can be caused by an allergic reaction, stress, or medication side effects.

Symptoms of hives include:

  • Itching or burning
  • Redness (inflamed) and swelling (edema) around individual spots
  • Swollen lymph glands in your neck and armpit areas
  • Small lumps or bumps that have a slightly red center surrounded by white skin.

Hives and swelling are a result of the immune system, which is the body’s defense against outside invaders such as bacteria and viruses. The immune system sends out special cells called antibodies to attack anything that it sees as a threat. When you have hives, these antibodies react to something in your body that shouldn’t be there like an infection or food you ate, and release histamine. Histamine causes blood vessels to dilate, which means they get bigger. This causes the skin to swell up and itchy spots (or hives) to appear.

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