Daughter has severe allergies but with a twist

Patient: Daughter 7 y old now. Severe allergies. Live in NJ. if allergies occur, then palms, soles of feet sweat, whole body itches. if no allergies, no sweat, no itch. went to allergist, tests done, just allergic to walnuts, grasses, dust mites, etc. i am a very allergic person, but never had sweaty palms, itching, etc., as a result of my allergies. Clariton has proven ineffective.constant coughing, first thing in AM. doesnt matter whose house.why does she have sweaty palms, feet if her symptoms onset?