Thanks for writing to us.
In cases of skin writing( dermatographism) and hives( urticaria) usually the treatment should be started in the form of oral antihistamines like cetirizine
, olopatidine and monteleukast . Usually these are used in combination. You may start with fexofenadine 120 mg in morning and cetirizine monteleukast combination in evening. If still hives are not controlled the dosage of these drugs can be increased upto four times the normal dose. Steroids are given in resistant cases not responding to antihistamines. I would advise that you meet a dermatologist
near by so that the lesions can be examined and appropriate treatment be started.
Hope that helped