Dermatographic urticaria

Dermatographic urticaria (also known as dermographism, dermatographia, or skin writing) is a skin condition characterized by the appearance of weals or welts on the skin as a response to scratching or firm stroking of the skin. It is the most common form of physical urticaria.

Symptoms

The main symptom of dermatographic urticaria is the rapid onset of raised red skin welts. These welts can appear anywhere on the body and can be triggered by a light scratch or pressure. They usually disappear within 30 minutes. Other symptoms can include itching, a burning sensation, and rarely, angioedema.

Causes

The exact cause of dermatographic urticaria is unknown. It is thought to be caused by an overactive immune response to a stimulus such as pressure or scratching. Some people may have a genetic predisposition to the condition. Certain factors can exacerbate symptoms, including stress, hot baths, alcohol, exercise, and certain medications.

Diagnosis

Diagnosis of dermatographic urticaria is usually based on the characteristic appearance of the welts. A doctor may also perform a skin writing test, where they lightly scratch the skin with a blunt object and observe the reaction.

Treatment

Treatment for dermatographic urticaria primarily involves avoiding triggers and managing symptoms. This can include avoiding scratching, wearing loose clothing, and using over-the-counter antihistamines. In severe cases, a doctor may prescribe stronger antihistamines or other medications.

See also

• Urticaria
• Angioedema
• Skin conditions
• Allergies

References

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