ⓘ Mast cell-dependent urticaria
The condition manifests as an allergic-like reaction, causing a warm red wheal to appear on the skin. As it is often the result of scratches, involving contact with other materials, it can be confused with an allergic reaction, when in fact it is the act of being scratched that causes a wheal to appear. These wheals are a subset of urticaria hives, and appear within minutes, in some cases accompanied by itching. The first outbreak of urticaria can lead to other reactions on body parts not directly stimulated, scraped, or scratched. In a normal case, the swelling will decrease without treatment within 15–30 minutes, but, in extreme cases, itchy red welts may last anywhere from a few hours to days.
- often linear in appearance are due to a benign condition called dermatographic urticaria Hives can also be classified by the purported causative agent
- Darier s sign is named after the French dermatologist Ferdinand - Jean Darier who first described it. Dermatographic urticaria synd 489 at Who Named It?
- Aquagenic urticaria also known as water allergy and water urticaria is a rarely diagnosed form of physical urticaria The defining symptom is an itchy
- degranulation. Urticaria pigmentosa is a rare disease, affecting fewer than 200, 000 people in the United States. Urticaria Dermatographic urticaria Generalized
- L50 Urticaria L50.0 Allergic urticaria L50.1 Idiopathic urticaria L50.2 Urticaria due to cold and heat L50.3 Dermatographic urticaria L50.4
- chronic, unspec. 708 Urticaria 708.0 Urticaria allergic 708.1 Urticaria idiopathic 708.3 Urticaria dermatographic 708.9 Urticaria unspec. 709 Other