I'm having itching all over body with no rash. i take anti histamine drugs allegra (fexofenadine) m. that only controls it not cures it. i also have asthama?

? dry skin: That's usually the case with atopic individuals,as you said you have asthma too, you may or may not start to have rash with continuous itching, antihistamines will just control the itch, skin care in form of bathing with cream soap, moisturizing your skin right after bathing while the skin is still moist, all that would help, keep your body well hydrated and watch your environment (cats,dust )