Coughing as soon as you lie down at night is generally seen in two conditions, namely reflux pharyngitis and chronic cardiac insufficiency, as follows: 1. Reflux pharyngitis: Young people are mostly seen with reflux pharyngitis, because when patients with reflux pharyngitis lie down at night, the reflux symptoms are relatively obvious, and the reflux of stomach contents to the throat stimulates the onset of coughing symptoms. 2. Chronic cardiac insufficiency: In the case of elderly people, it is generally Most often caused by chronic cardiac insufficiency, especially in elderly people with hypertension, coronary artery disease and other underlying diseases, due to the appearance of chronic cardiac insufficiency, so the amount of cardiac blood return increases at night as soon as you lie down, leading to an increased load on the heart, which will further aggravate pulmonary stasis, which will cause cough symptoms after the appearance of pulmonary stasis, and even cause chest tightness, shortness of breath and breathing difficulties. Therefore, if you cough at night when you lie down, you can promptly improve gastroscopy and cardiac ultrasound for clarification.