Every time you are about to fall asleep, you suddenly feel that your chest is holding your breath all the time, which may be caused by excessive fatigue, inflammation of the larynx, infection in the lungs, etc. It can be treated by adjusting the lifestyle, nebulizing, and taking antiviral drugs. 1. Excessive physical fatigue: the body is continuously in a state of high-intensity work, without sufficient rest, endocrine disorders, sympathetic nerve abnormal excitation, affecting the function of the cardiac system, which can cause symptoms such as falling asleep and holding breath in the chest repeatedly. Patients can improve by adjusting their lifestyle, combining work and rest, and developing good work and rest habits. 2. Inflammation of the larynx: Laryngitis can cause spasm of the larynx, which affects the entry of air and makes it difficult to inhale. Before laryngitis is under control, you may suddenly feel breathlessness in your chest every time you fall asleep, which can be treated with nebulized inhalation of Ambroxol Hydrochloride or Gentamicin. 3. Intra-pulmonary infections: Repeated chest breathlessness and dyspnea are typical manifestations of intra-pulmonary infections. It is recommended to take antiviral drug ribavirin, phlegm and cough medication aminobromine and other drugs for supportive treatment, and the symptoms will improve after the infection is under control. If the patient is about to fall asleep every time suddenly to the chest breathlessness has been repeated, it is recommended that the patient promptly consult a doctor, under the guidance of the use of drugs.