Wearing bra allergy is mostly because the patient is allergy-prone, and it is related to the steel ring or rubber band of the bra and the chemical fiber fabric. In this case, you can replace the bra with a breathable, cotton, without steel ring, and also try not to wear the bra of chemical fiber fabric. If the itchy skin is severe, the patient can take loratadine or cyproheptadine to relieve the allergy symptoms, or apply glyburide lotion to stop the itch. Try not to wear a bra at home to reduce the time of contact with the skin, or wear simple underwear instead of a bra to avoid contact with allergens.