What causes bad sleep at night?

There are many reasons for poor sleep at night, including: 1. Disease influence, such as cerebral hemorrhage, intracranial occupation and other cerebrovascular diseases; arrhythmia, angina pectoris, heart failure and other cardiovascular diseases; sleep apnea syndrome, bronchial asthma, chronic obstructive pulmonary disease and other respiratory system diseases; nocturnal enuresis, male prostatic hyperplasia, urinary tract infection and other urogenital diseases. 2. Psychological factors, such as long-term stress or excessive tension caused by brain cell regulation dysfunction, resulting in abnormal sleep. 3. Environmental factors, such as adjustment to a new living environment or excessive light, noise. 4. Drug effects, such as theophylline, analgesics, psychotropic drugs, etc., resulting in increased nerve excitability resulting in sleep disorders.