Light sleep is caused by a variety of reasons, and is related to old age, poor mental and psychological state, sleep breathing syndrome and other reasons. Patients need to combine with other physical symptoms to clarify the cause of the disease and then carry out targeted treatment.1, old age: healthy adults sleep for 7 hours at night, deep sleep period is about 2-3 hours, the rest is light sleep and non-rapid eye movement sleep. Children’s non-rapid eye movement sleep, light sleep period and deep sleep period each account for half. But in old age, especially after 70 years old, there may be basically no deep sleep period, and most of the time is REM sleep and light sleep period, so there is an age factor for light sleep; 2, poor mental and psychological state: some people have anxiety, depression, and over-vigilance, which may result in a long period of light sleep at night and a decrease in the period of deep sleep. symptoms, but if the symptoms are serious, oral medication can be taken under the guidance of the doctor for treatment; 3. Sleep apnea syndrome: due to obesity, cerebrovascular disease and other reasons, patients have sleep apnea syndrome, sleep is often suffocated to wake up, and the deep sleep period is very short. Patients can be treated with medication or surgery according to the specific situation; 4, other: noisy environment, pediatric rickets and other reasons can also lead to symptoms of shallow sleep during sleep, need to improve the sleep environment, remove the cause of the disease, relieve physical discomfort.