One-month-old babies do not sleep during the day and poor sleep environment, inadequate feeding and other physiological factors, but also may be indigestion, rickets and other related. 1. Physiological factors: sleep environment is noisy or inappropriate temperature and humidity, feeding insufficient baby excessive hunger, etc., may cause one-month-old babies do not sleep during the day phenomenon. 2. Indigestion: if parents do not feed the baby indigestion, some babies may not sleep during the day because of epigastric pain, fullness after meals, constipation or diarrhea and other symptoms. 3. Rickets: Rickets is related to insufficient intake of vitamin D and lack of sufficient sun exposure. Some patients have atypical initial symptoms, but there are some children can be manifested as excessive sweating, irritability, restless sleep, often wake up, square skull, X-shaped legs, etc., can also be accompanied by physical discomfort and daytime sleeplessness. One-month-old babies do not sleep during the day, there may be other reasons, it is recommended to go to the hospital in time, complete the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.