A two-month-old baby sleeps for a shorter period of time than he/she did at birth, but normally, he/she also sleeps 15-18 hours a day, while most of the baby’s sleep time is at night. Some babies are more energetic and may sleep relatively less, on the contrary, some babies sleep relatively longer. As long as the baby is in good spirits, eats normally (waking up for milk in about 3-4 hours), has normal stools, and has good growth and development, it proves that the baby is in good health. When there is diarrhea, lack of calcium, or being frightened, the baby’s sleep time may be affected to a certain extent. Parents need to pay close attention and judge according to the corresponding manifestations, and when the feeling is serious, it is necessary to go to the pediatric department of the hospital for consultation. It should be noted that when the baby has anorexia and sleeps more than 20 hours or less than 14 hours, it is necessary to go to the pediatric department of the hospital for examination.