Overview

Urticaria is a skin reaction characterized by raised, itchy welts. These welts may vary in size and appear suddenly. The condition may be acute or chronic. The rash can affect any part of the body. Swelling beneath the skin may also occur. Episodes may last from hours to days. Chronic cases may persist for weeks or months. The severity varies among individuals. Urticaria can significantly affect comfort and sleep. Medical evaluation helps determine duration and pattern.

What Happens During Allergic Rhinitis?

During an episode, certain cells in the skin release histamine. This causes blood vessels to leak fluid into surrounding tissues. The result is raised, red, itchy welts. These lesions may move from one area to another. Swelling may also affect deeper layers of the skin.

Diagnosis

Diagnosis is based on clinical examination and history. A doctor evaluates pattern and duration of episodes. In chronic cases, blood tests may be done to identify underlying causes.