Lying down at night with a strong cough with phlegm has many reasons, can be related to cardiac insufficiency, chronic pharyngitis, cough variant asthma and other reasons, the need for symptomatic drug treatment, pay attention to life care. 1. cardiac insufficiency: a part of patients with chronic cardiac insufficiency, lying down at night will appear to increase the volume of return blood, the heart load increases, aggravate the lungs bruises, causing coughing, accompanied by dyspnea, coughing up pink foamy sputum, you can take a sitting position, the symptoms can be alleviated, but also need to consult a doctor in time. 2. Chronic pharyngitis: With chronic pharyngitis, the mucous membrane of the throat is stimulated by dry air and phlegm when sleeping at night, which can easily lead to severe coughing and phlegm symptoms. If the infected person can follow the doctor’s instructions to use amoxicillin and other antibiotic treatment, local use of compound borax solution gargle to ease the discomfort, usually pay attention to rest, three meals a day diet nutritional balance. 3. Cough variant asthma: inhalation of allergens coupled with the sensitivity of the respiratory mucosa leads to cough variant asthma, nighttime airway sensitivity increased cough exacerbation, can be used under the guidance of the doctor inhaled glucocorticosteroids (eg, budesonide), bronchodilator (eg, salbutamol) treatment, daily away from the allergens, pay attention to keep warm. There are many reasons for coughing heavily with phlegm when lying down at night, you should go to the hospital in time to clarify the cause of the disease, under the guidance of the doctor for treatment, to avoid delaying the condition.