The underlying causes of dermatographia are unknown, but many doctors believe the resulting marks develop when the immune system becomes confused or overactive in response to stimuli, such as frequent exposure to rough surfaces. Heat and exercise can worsen symptoms for some people, although others are more affected by cold. Some cases may be related to persistent dry skin or exposure to common drugs, such as antibiotics.
Receive updates on the latest news and alerts straight to your inbox.
This site offers information designed for educational purposes only. You should not rely on any information on this site as a substitute for professional medical advice, diagnosis, treatment, or as a substitute for, professional counseling care, advice, diagnosis, or treatment. If you have any concerns or questions about your health, you should always consult with a physician or other healthcare professional.