Garlic has no efficacy or effect in treating cough and relieving it. Cough is a common symptom that can be caused by a variety of diseases. Common causes of cough include respiratory diseases such as infectious diseases and cough variant asthma, digestive diseases such as gastroesophageal reflux disease, and cardiovascular diseases such as heart failure. If you need to relieve your cough, you need to treat the cause of the cough, and you also need to replenish nutrients through food during the coughing period. Garlic as a food does not have the effect of medicine, so it can not treat cough. However, garlic contains proteins, fats, carbohydrates, vitamins, minerals and other nutrients that provide the body with the necessary nutrients. Because garlic has a pungent and stimulating flavor, taking garlic when coughing, especially with the airway high reaction patients, eating too much garlic is easy to stimulate the pharyngeal mucosa, at the same time cause airway spasm, may lead to aggravation of cough. Therefore, garlic should be consumed in moderation during coughing. If the cough is recurrent, it is recommended to consult a doctor in time, improve the examination, clarify the cause of the disease, and carry out causative treatment under the guidance of the doctor.