Occasionally overnight may just feel fatigue, sleepy, timely supplemental sleep during the day or simple conditioning can be restored to normal, generally not much harm to the body. Occasional overnight is not very harmful to the body, generally will not damage the function of all parts of the body organs, may just feel fatigue, sleepy, timely supplemental sleep or simple conditioning can be restored to normal. However, long-term overnight will seriously affect the health of the body, may lead to decreased resistance, susceptible to pathogenic infections; digestive system dysfunction, causing gastrointestinal discomfort, loss of appetite, indigestion; harm to the cardiovascular and cerebral vascular, increase the risk of coronary heart disease, angina pectoris, arteriosclerosis, and other diseases, and in severe cases, may lead to sudden death. Therefore, patients should maintain regular work and rest and adequate sleep, to avoid long-term overnight stay, it is recommended that patients with physical discomfort, should go to a regular hospital in a timely manner, under the guidance of the doctor’s treatment, do not be negligent, so as not to affect their health.