Description An itchy rash that ...
Description
An itchy rash that is caused by fluid entering the skin after a localized release of histamine. An allergic reaction is the most common cause. Occasionally they are chronic and recurrent with no known inciting event. They occur singly and in groups and can affect the lips, eyes and other mucous membranes of the body as well as the skin.
Symptoms
Rash consisting of batches of raised, red or white itchy welts. The welts vary in size and can appear and disappear quickly. Similar swelling and rash may appear in the eyes, mouth and vagina.
Tests
Common tests used for diagnosis and treatment
Workup:
A history and physical exam will be performed. People with chronic urticaria will have blood tests to look for an underlying cause. Also allergy testing may be performed.
Do I need this test?
Don't routinely do diagnostic testing in patients with chronic urticaria. In the overwhelming majority of patients with chronic urticaria, a definite etiology is not identified. Limited laboratory testing may be warranted to exclude underlying causes. Targeted laboratory testing based on clinical suspicion is appropriate. Routine extensive testing is neither cost effective nor associated with improved clinical outcomes. Skin or serum-specific IgE testing for inhalants or foods is not indicated, unless there is a clear history implicating an allergen as a provoking or perpetuating factor for urticaria.
Specialists:
Internal Medicine, Dermatology, Pediatrics, Family Practice, Allergy and Immunology, Pediatric Allergy and Immunology, Pediatric Dermatology, Telemedicine Dermatology
Workup:
A history and physical exam will be performed. People with chronic urticaria will have blood tests to look for an underlying cause. Also allergy testing may be performed.
Do I need this test?
Don't routinely do diagnostic testing in patients with chronic urticaria. In the overwhelming majority of patients with chronic urticaria, a definite etiology is not identified. Limited laboratory testing may be warranted to exclude underlying causes. Targeted laboratory testing based on clinical suspicion is appropriate. Routine extensive testing is neither cost effective nor associated with improved clinical outcomes. Skin or serum-specific IgE testing for inhalants or foods is not indicated, unless there is a clear history implicating an allergen as a provoking or perpetuating factor for urticaria.
Specialists:
Internal Medicine, Dermatology, Pediatrics, Family Practice, Allergy and Immunology, Pediatric Allergy and Immunology, Pediatric Dermatology, Telemedicine Dermatology
Treatment
If the urticaria is due to one or more allergens, avoidance is the best way to reduce recurrences. Treatment includes antihistamines and corticosteroids. Severe acute cases may require epinephrine.