Itchy rash on body (hives) or urticaria is a common allergic reaction affecting people of all ages. This condition causes sudden, itchy, red welts on the skin, significantly impacting daily life and social interactions. Urticaria occurs when the immune system overreacts to triggers, particularly certain foods. Common culprits include nuts, shellfish, eggs, and dairy, though any food can potentially cause a reaction. Symptoms typically appear within minutes to hours after consuming the trigger food. 

Treatment focuses on avoiding trigger foods and managing symptoms, primarily with antihistamines. Severe cases may require oral corticosteroids. Long-term management involves identifying and eliminating trigger foods through elimination diets and allergy testing. Emotional support is crucial, especially for children and teenagers, as food allergies can be challenging to navigate. 

While Itchy rash on body (hives) or urticaria can be unpredictable, most cases are manageable with proper care, dietary adjustments, and medical support. Education about food allergies is essential for patients and their families.