Triggers and Causes
As a rule, even extensive testing tends to ascertain no clear cause for dermographic urticaria. Intolerance reactions to drugs like penicillin, acetylsalicylic acid (e.g. in Aspirin®), codeine, sulphonamides or lidocain are usually prime suspects. Other illnesses that commonly occur in connection with dermographic urticaria are parasite diseases or mastocytosis, i.e. an overabundance of mast cells in the body. The role of intolerance reactions to foods and food components in dermographic urticaria remains controversial.
Dermographic urticaria is often associated with other forms of urticaria. In such cases it is often – but not always - related to a common cause.