Sweating on the chest while sleeping at night may be caused by too thick bedding, angina pectoris, chronic obstructive pulmonary disease, sleep apnea, hypoglycemia and so on. 1. Thick bedding during nighttime sleep leads to an increase in body surface temperature, and the body dissipates heat through sweating. In addition, poor air flow in the bedroom and heat and dryness can also cause the above symptoms. 2. Angina pectoris: coronary artery spasm, coronary plaque rupture and other factors may occur during sleep at night, leading to myocardial ischemia, angina pectoris and cause the above symptoms. 3. Chronic obstructive pulmonary disease (COPD): due to inflammatory lesions in the airway leading to airway narrowing or even obstruction, dyspnea during sleep at night, and lack of oxygen in the body, resulting in the above symptoms. 4. Sleep apnea: nasal polyps, enlarged tonsils, obesity and other factors lead to narrowing of the upper airway, the airway collapses during sleep, respiratory disorders and the emergence of the above symptoms. 5. Hypoglycemia: eating too little before going to bed at night, applying too much insulin and other factors lead to hypoglycemia attacks during sleep, stimulating sympathetic vagus excitation, panic and sweating symptoms. Chest sweating at night may be related to a variety of factors, it is recommended to consult a doctor for a clear diagnosis.