Frequent coughing without what to eat to enhance immunity. Frequent cough is not necessarily poor immunity, may be related to chronic diseases of the respiratory system, pleural disease, cardiovascular disease, allergies and other factors, need to treat the cause in order to alleviate cough symptoms. 1. Chronic diseases of the respiratory system: such as chronic bronchitis, bronchiectasis, etc. can have chronic cough, cough sputum and other manifestations, such as phlegm, you can use aminobromine, bromohexine and other cough medications to resolve phlegm. Chronic bronchitis and bronchiectasis patients need to pay attention to warmth, avoid infection, such as acute infection, need to use azithromycin and other antibiotics anti-infection treatment. 2. Pleural diseases: pleurisy can also cause frequent coughing. If pleurisy is caused by bacterial infection, sensitive antibiotics should be used for anti-infection treatment. If it is caused by tuberculosis infection, anti-tuberculosis drugs, such as isoniazid, rifampicin, pyrazinamide and other drugs, can be used. 3. Cardiovascular disease: such as heart failure can also cause cough, mainly at night, can be relieved by taking diuretics such as furosemide, spironolactone and enhance myocardial contractility such as digoxin and other drugs. 4. Allergy: mainly refers to allergic cough, such as mites, willow floss and other allergies can also appear cough performance, can take antihistamines such as cetirizine, loratadine and other drugs to alleviate the symptoms. Cough can be caused by a variety of reasons, such as symptoms do not ease or aggravation, need to consult a doctor in a timely manner, under the guidance of the doctor to carry out targeted examination after a clear, and to take the treatment, can not blindly use drugs.