What type of allergies cause skin itching and bladder problems? Can't see an allergist because I have to take antihistamine to curb symptoms

U can still see. an allergist while on antihistamine, skin testing isn't indicated in every case. While I can't see any relation of skin itching and bladder problems, the bladder problem can be a side effect to using an antihistamine. Good history and physical exam are needed for good management of your case, best wishes.