physical urticaria familial dermatographia https://rarediseases.info.nih.gov/diseases/9480/familial-dermographism https://www.malacards.org/card/dermatographia https://www.malacards.org/card/dermographism_familial dermographism DOID:743 vibratory urticaria DDU dermographism, familial UMLS:C1852145 ICD9:708.3 Familial dermographism is a condition also known as skin writing. When people who have dermatographia lightly scratch their skin, the scratches redden into a raised wheal similar to hives. Signs and symptoms of dermatographia include raised red lines, swelling, inflammation, hive-like welts and itching. Symptoms usually disappear within 30 minutes. The exact cause of this condition is unknown. Treatment may involve use of antihistamines if symptoms do not go away on their own. Dermatographism, familial OMIM:125635 dermatographia familial dermatographism MEDGEN:342170 ICD10CM:L50.3 MONDO:0007448 dermo-distortive urticaria vibratory angioedema EFO:1000685 dermatographic urticaria SCTID:7632005 MESH:C536612 Dermodistortive urticaria familial dermographism VBU