Coughing when you breathe indicates the persistence of the causes of coughing, mainly for the following three reasons: 1. Respiratory tract infections: Inflammatory factors gather in the airways and stimulate the mucous membranes of the bronchi and trachea when you breathe, leading to coughing. At this time, anti-allergic treatment is needed and allergen tests should be completed to avoid contact with allergy-causing substances. If allergic rhinitis is present, allergic rhinitis should be actively treated; 3. Pulmonary function test, after a clear diagnosis, can be inhaled for treatment.