A condition in which scratching the skin causes raised, hive-like lines.

Dermatographic urticaria is a condition in which scratching the skin causes raised, hive-like lines. It's also called skin writing and dermatographism.

The condition may cause itchiness. Lines usually vanish within 30 minutes but can last several hours to days.

If the condition is bothersome, a mild antihistamine medicine taken by mouth may provide relief.