Two-month-old babies do not sleep soundly, usually due to a lack of calcium, vitamin D and other trace elements, or imperfect development of the head, or due to environmental discomfort and other reasons. Common causes and treatment a. Physiological factors: the baby’s head development is not yet perfect, the sleep nerve center is not mature, so it can not sleep peacefully. As the baby grows older, all parts of the function gradually perfect, the symptoms of sleeplessness will be improved. Second, environmental factors: if the baby’s sleep environment temperature is too low or too high, there are mosquito bites, air is too dry or humid, may lead to uncomfortable baby. Parents should observe the baby’s sleep environment, adjust the temperature to a comfortable state, check whether the pillow and quilt are damp, and keep the room dim, more help the baby to sleep. Third, pathological factors: 1, lack of calcium, vitamin D and other trace elements: If the baby’s body is lack of calcium, vitamin D and other trace elements, there will be irritability, sweating, crying and other symptoms, may also lead to rickets. Parents should take their babies to go outdoors in the sun properly and supplement the lack of calcium or vitamin D under the guidance of a doctor.2. Brain diseases: If the baby cries, wakes up easily and has difficulty sleeping for a long time, it is recommended to go to the hospital for a comprehensive examination to check whether there are problems such as hypoxic-ischemic encephalopathy. If there are disease factors need to be treated as early as possible, giving oxygen therapy, as well as symptomatic treatment to avoid further adverse consequences. Note parents can hum lullabies or pat or stroke the baby with their hands when the baby is not sleeping solidly to make the baby feel secure so that he or she can sleep solidly.