Cough is a relatively common condition in our real life and almost everyone has experienced it. People who have frequent coughs find that there is a problem that they have few or no coughs during the day, while at night they have frequent, violent coughs that seriously affect our normal sleeping and breathing. Causes of coughing at night: The causes of coughing that worsen at night are different for different reasons. I. If you are a patient with chronic cardiac insufficiency, you may cough due to increased pulmonary stasis when you sleep in a flat position at night. Sudden chest tightness, inability to breathe, coughing and blood-tinged sputum halfway through your sleep are likely to be caused by heart disease, and it is best to seek medical attention as soon as possible. Second, if you are suffering from diseases such as chronic bronchitis, you may have a violent cough due to the aggravation of phlegm irritation when you lie down at night while sleeping. Third, if you cough because you have chronic pharyngitis and breathe with your mouth open while sleeping, the mucous membrane of the throat and respiratory tract is stimulated by cold air for a long time triggering airway spasms. IV. The reason for the indoor temperature is that it is hot in summer and cold in winter, and many people sleep with the air conditioner on at night, while the temperature difference between night and day is large, which can lead to coughing. V. Diseases that cause coughing at night, such as allergic cough. Allergic cough is a persistent or recurrent violent cough, mostly in paroxysmal episodes, more pronounced in the morning, more severe at night than during the day, with a long-lasting cough that usually lasts for three months, more often during the pollen season. Sixth, the cough starts within half an hour of going to bed and is relieved after sitting up. This cough is mostly caused by nasal mucus flowing backwards to irritate the throat and may be caused by upper respiratory tract infections, such as allergic or non-allergic rhinitis, and acute or chronic sinusitis. Seven, coughing at 4:00 or 5:00 a.m. If it is prolonged, it may be an asthma attack and requires prompt medical attention and identification of the allergen, or if it is short-term, it may be bronchitis. If you have a sudden, violent, acute cough about 1 to 2 hours after going to sleep, accompanied by chest tightness, flatulence, dry mouth, bitterness, hoarseness and heartburn, it is likely to be a cough caused by gastroesophageal reflux. Nine, if you suddenly cough more than once during sleep, feeling like you are choking, and have shallow sleep and nightmares, you may have upper airway obstruction syndrome, which is related to sleep apnea syndrome, and can be diagnosed at a sleep specialist. To sum up, if coughing intensifies at night, we need to check specifically what causes the cough. We should know that coughing is a means of detoxification and a stress response of our body, and it is actually good in a sense for patients to have a pathological cough, because it can suggest the existence of abnormal changes in our body and help us to detect diseases in time, so it is recommended that we actively seek medical advice to determine the condition as early as possible and then treat it symptomatically.