How long it takes for a lung rumble to clear up needs to be judged by the pathogen that the patient is infected with, and cannot be generalized. If the lung rales are caused by common bacterial infections or inflammation, the lung rales will gradually disappear until they are completely resolved after about 1 week of continuous medication. If the patient has a lung infection or inflammation caused by mycoplasma or chlamydia, the lung rales will disappear after more than 2 weeks of continuous drug treatment. If the patient has a more serious lung infection with complications, such as lung abscess, complete improvement may take 2 weeks, or even about 1 month. If the patient has bronchial asthma or obstructive lung disease, there will be dry rales in the lungs, which need to be treated according to medical advice and the dry rales will disappear when the asthma is relieved. Patients with rales in the lungs usually eat a diet rich in protein and vitamins to improve immunity, and should not eat spicy and stimulating foods, and pay attention to keeping warm.