Symptoms of dermatographia may include:  Raised, inflamed lines where you scratched. Welts from friction. Swelling. Itching.  The symptoms may occur within a few minutes of the skin being rubbed or scratched. They tend to go away within 30 minutes. Rarely, the skin symptoms develop more slowly and lasts several hours to days. The condition itself can last for months or years.
symptoms dermatographia may include:  raised  inflamed lines scratched  welts friction  swelling  itching   symptoms may occur minutes skin being rubbed scratched  tend away 30 minutes  rarely  skin symptoms develop slowly lasts hours days  condition can last months years
dermatographia