What is dermographism?

Dermographism, also known as dermatographia or skin writing, is a condition in which the skin becomes red and swollen when scratched or rubbed. The name comes from the Greek words "derma" (skin) and "graphein" (to write).

Dermographism is a common condition, affecting up to 5% of the population. It is more common in women than men and typically begins in adulthood.

The exact cause of dermographism is unknown, but it is thought to be related to a histamine reaction. Histamine is a chemical that is released by the body in response to injury or inflammation. In people with dermographism, histamine is released too easily, causing the skin to become red and swollen.

Symptoms of dermographism include:

* Redness and swelling of the skin when scratched or rubbed

* Itching

* Blistering

* Wheezing

* Shortness of breath

* Dizziness

* Fainting

In most cases, dermographism is a mild condition that does not require treatment. However, if your symptoms are severe or interfere with your daily activities, you may want to see a doctor.

Treatment for dermographism may include:

* Antihistamines

* Corticosteroids

* Calcineurin inhibitors

* Phototherapy

Dermographism is usually a lifelong condition, but it can improve over time. With proper treatment, most people with dermographism can live normal, healthy lives.