The baby is very sleepy is not sleep may be with physiological factors, such as hunger, sleeping environment is not good, pathological factors such as pain in certain parts, breathing is not good, etc., specific analysis is as follows: 1. Physiological factors: the baby may not have eaten enough, the room environment is not good, such as too cold or too hot, too noisy, can cause the baby discomfort, affecting sleep. 2. Pathological factors: such as the baby some parts of the pain, such as colic, in pain even if very sleepy, not easy to sleep, nasal congestion caused by poor breathing, etc. will also affect the baby to sleep, there may also be crying phenomenon. The baby is very sleepy is not sleep may be and other reasons are also related, it is recommended to go to the hospital in a timely manner to carry out relevant examinations, to clarify the cause of the symptomatic treatment.