How many days a day with only 2 hours of rest can last depends on the patient’s physical condition, those with good physical condition can last for more than 20 days, while those with weak physical condition can only last for 2-3 days. Sleep plays a vital role in the body, allowing the body’s systems to get enough rest. Normal adults need 7-8 hours of sleep every day to ensure normal work and study. If the patient is in the state of less sleep time for a long time, the body systems are overloaded, which will lead to the dysfunction of various functions, and the patient is in a long-term sub-healthy state. Physical condition of good patients, sleep 2 hours a day can adhere to more than twenty days, but it will also lead to organism damage, some patients can only adhere to 2-3 days. In short, long-term sleep deprivation is one of the factors affecting various chronic diseases, such as cardiovascular disease, diabetes, etc., and in severe cases, it may also lead to viral myocarditis and sudden death.