Three-month-old babies do not sleep at night may be due to excessive daytime sleep, indigestion, upper respiratory tract infections and other reasons related to the adjustment of work and rest time, medication, physical therapy and so on to improve. 1. too much sleep during the day: if the baby sleeps more during the day, the baby may not sleep at night, then you can adjust the baby’s work and rest time, let the baby sleep less during the day; don’t let the baby be too excited before going to bed at night. 2. indigestion: it will cause the baby bloating, affecting the baby sleep, you can take probiotics such as clostridium casei bacillus bacillus, bacillus subtilis bacillus granules and other drugs to regulate intestinal flora, improve intestinal function; in addition to the baby can be given a clockwise direction massage of the abdomen, to promote the digestion of food. 3. Upper respiratory tract infection: this disease makes the baby feel uncomfortable, will affect the baby’s sleep, need to target pathogens for treatment, such as viral infections, there is no special medication; such as bacterial infections caused by the use of cefixime, amoxicillin and other medications, anti-infective treatment, as prescribed by the doctor; if the presence of nasal congestion can be used to apply hot compresses on both sides of the nose, or use saline or special nasal cleansing solution to clean up the nasal cavity secretions; fever can be for physical cooling, if necessary, follow the doctor’s instructions to use ibuprofen suspension cooling treatment. The baby’s discomfort is relieved. There are many other reasons why three-month-old babies don’t sleep at night, and it is recommended to consult a doctor in time to be evaluated and handled or treated by a specialist. All of the above medications should be used under doctor’s supervision, avoid self-medication.