The symptoms of dermatographic urticaria include raised, red streaks on the skin after minor scratches, accompanied by itching; the main cause is related to hypersensitivity of mast cells in the skin. It is recommended to seek medical attention promptly for diagnosis and to minimize skin irritation in daily life.
Specifically:
1. Symptoms: When the skin is scratched by a fingernail, hard object, etc., a red mark similar to a wheal will appear in the local area within a few minutes. The shape is often consistent with the scratch. The itching is quite obvious. It usually subsides on its own within half an hour to a few hours, but it may recur.
2. Common causes: Most patients have constitutional factors, where mast cells in the skin are prone to releasing histamine due to physical stimulation, triggering a reaction; a few may be related to infection, endocrine changes, or the effects of certain drugs, but the specific mechanism varies from person to person.
To alleviate discomfort, you can take the following measures: avoid wearing rough clothing, reduce rubbing while bathing, and keep your skin moisturized; apply cold compresses or use anti-allergy medication as prescribed by your doctor when itching occurs, and record the occurrence of symptoms to help your doctor determine the cause. If symptoms are frequent or worsen, please see a dermatologist for a professional examination.
