What Illness Causes Hives?

What causes hives? A variety of things can cause hives, including allergic reactions to foods, medications, or other substances; contact dermatitis (a skin condition caused by direct exposure to an allergen); viral infections; parasites; and certain types of cancer. Hives are a skin rash that most commonly occurs on the arms, legs, and trunk. The rash is caused by an allergic reaction and can be very itchy. Many different illnesses can cause hives, but the most common are food allergies and asthma.

Many different illnesses can cause hives, but the most common is an allergic reaction. Other causes include viral infections (such as the common cold), environmental allergies, Lyme disease, sarcoidosis, and certain medications. Most people experience a mild rash and itchy skin after exposure to the triggering agent. If the trigger is not avoided and the person continues to have exposure to the allergen, they may develop more severe symptoms including hives.

What Illness Causes Hives?

There are many potential causes of hives, but some of the most common ones include allergies, asthma, food allergies, environmental allergens, and other immune-mediated diseases. Other possible causes include parasites (such as lice or mites), skin conditions (such as eczema or psoriasis), and viral infections (such as the cold or the flu). A few rare cases can even be caused by medications or toxins. Hives are a common skin condition that can be caused by several different illnesses.

Causes of hives vary, but the most common causes are allergies and various infections. Other causes can include environmental factors such as certain chemicals or dust mites, and autoimmune disorders such as lupus. Some people get hives from eating foods that contain specific allergens, while others develop hives after experiencing a stressor or during an infection.

Here are some of the most common causes: 

  • Allergic reactions, such as hay fever or anaphylaxis, can cause hives.
  • Environmental triggers, such as exposure to pollens, animal dander, or other substances, can also cause hives.
  • Viral infections, such as herpes simplex virus (HSV) or human coronavirus (HCV), can lead to hives.
  • Autoimmune conditions, such as lupus or eczema, can also cause hives.
  • Infections with parasitic organisms, such as malaria or schistosomiasis, can lead to hives.

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