Sleeping at 11:30 is generally considered to stay up late, but due to different personal work and rest, it can not be generalized. The best sleep time for adults is generally 6 to 8 hours, even if you go to bed late, get up late to ensure that the night sleep time is enough 6 to 8 hours, but sleeping late does not meet the body’s metabolic pattern, but may also affect the quality of sleep, difficult to ensure that a good deep sleep, the health of all aspects are not good. The harm of long-term late night immunity, memory loss, cardiovascular disease, etc., 11:30 to bed is generally considered to stay up late, but due to different personal work and rest, can not be generalized, of course, or recommend that we develop a good routine, sleep on time, get up on time, try not to stay up late. If you feel unwell, you should go to the hospital in time and consult your physician for guidance.