In most situations, histamine causes your blood vessels to dilate and leak fluid, creating the raised areas on your skin (hives). Histamine also affects your nerve cells, signaling your skin to ...

You may also have other forms of hives. Hereditary angioedema: Painful swelling under the skin. It runs in families. Your doctor will ask you many questions to try to find the cause of hives or ...

There are many other types of rashes with a wide variety of causes. Treatment for a rash requires the correct diagnosis and can include medication and avoiding potential triggers.  Easily ...

A rash is defined as a widespread eruption of skin lesions. It is a very broad medical term. Rashes can vary widely in appearance. Their causes range from insect bites to HIV and reactions to ...

They’re caused by allergies or allergy-like skin reactions to irritants. Hives are a type of rash. There are many other types of rashes. A rash causes patches of redness, swelling, itching ...

Skin reactions can be alarming, especially when they appear suddenly. Many people struggle to tell the difference between hives and a rash, but knowing the cause is the first step toward relief.

a rare but potentially severe condition that can cause developmental issues. Roseola is a common viral skin rash in babies. It’s contagious and caused by human herpesvirus 6, which affects ...

Understanding the causes, symptoms, treatment options, and why urticaria may worsen at night is essential for effective management. Urticaria is an inflammatory skin disorder. According to the ...