The exact cause of dermatographia isn't clear. It may be caused by an allergic response, yet no specific allergen has been identified.
Simple things can trigger symptoms of dermatographia. For example, rubbing from your clothes or bedsheets may irritate your skin. Sometimes, dermatographia is preceded by an infection, emotional upset or medications, such as penicillin.
Sept. 04, 2015
- Dice JP, et al. Physical urticarias. http://www.uptodate.com/home. Accessed Aug. 16, 2015.
- Goldsmith LA, et al., eds. Urticaria and angioedema. In: Fitzpatrick's Dermatology in General Medicine. 8th ed. New York, N.Y.: The McGraw-Hill Companies; 2012. http://www.accessmedicine.com. Accessed Aug. 16, 2015.
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- Amin P, et al. Investigation of patient-specific characteristics associated with treatment outcomes for chronic urticaria. Journal of Allergy and Clinical Immunology: In Practice. 2015;3:400.