What Is The Treatment For Dermatographism?

Heelo sir ,I have a problem realted with skin,when i consulted witha a physician ,he told me about dermatographism,Coulsd you please suggest me...He prescribed me Rupanex tablet ,but the probles still remains same ,i got relief up to the some extent but still i am in triuble.
So,Shoul i continue with his treatment or should i do 4 dermatologist??