Urticaria (Hives, Welts, Nettle Rash)

The cause is often the release of the tissue hormone histamine from mast cells and basophils in an allergic reaction. However, certain drugs can also trigger the symptoms. Histamine widens smaller blood vessels, making them more permeable. This results in reddened skin and the formation of hives. Histamine is also involved in the development of itching.

Infections, often in combination with medication (e.g. aspirin, antibiotics), allergic reactions and intolerances can be among the extremely varied causes of acute urticaria.

In addition to a basic laboratory examination, we also exclude all allergies and take a skin sample, if necessary. A diet diary is helpful. This is followed by an examination where the patient is literally turned upside down in order to find the possible triggers. Finally, an exclusionary diet and provocation tests can help; a hospital stay is usually necessary for this.

In addition to creams for itching, possibly containing cortisone, we also use antihistamines. In therapy-resistant cases, we can use the anti-IgE antibody Omalizumab (Xolair) in treatment.