Finding the cause of it is the first step. It could be from soap or body wash your using, your shampoo or conditioner, shaving cream, or any other product you use. Try switching one product at a time and see if it makes a difference. If it continues after youve ruled out every product it could be a water allergy or an allergy to something in your citys water.
your probably allergic to the soap ur using, try using soap for sentsitive skin