One month baby sleep less may be a normal situation, may also be a lack of vitamin D, functional indigestion, gastroenteritis, brain injury, etc., need to identify the cause in time, the line of targeted treatment. If the baby’s diet, excretion, weight, spirit and other normal, no crying, depression, etc. can not worry, normal feeding can be. Second, the pathological factors 1, lack of vitamin D: vitamin D deficiency can affect calcium absorption, occipital baldness, sweating, night terrors, etc., resulting in a month of infant sleep less, and poor sleep quality, affecting growth and development. It is recommended to follow the doctor’s instructions to supplement vitamin D in a timely manner, appropriate sun exposure; 2, functional indigestion: one month infant gastrointestinal function is weak, if there is functional indigestion, often lead to the baby can not sleep at ease. Need to improve the diet, such as breastfeeding, the mother can eat rice soup, fish soup and other easily digestible food, avoid raw and cold stimulating food, the umbilical cord can be hot compresses, massage, but also take probiotic preparations to promote intestinal peristalsis, improve the symptoms; 3, gastroenteritis: If the baby is mixed feeding or artificial feeding, in the feeding process does not pay attention to the hygiene of the apparatus, or improper feeding, can trigger germ infection, gastrointestinal inflammation , leading to baby sleep less, easy to cry. Parents should feed reasonably, pay attention to the hygiene of the bottle, regular disinfection, if necessary, need to seek medical treatment; 4, brain injury: if the baby in January, stunted, lack of oxygen during birth, violent birth compression, can be manifested as the inability to suck milk on their own, easy to cough and choke, easy to wake up, etc., so children with brain injury are also prone to less sleep. It is necessary to ensure smooth breathing, proper diet, brain examination as prescribed by the doctor, neuro-nutrients, and parents can exercise brain function through stimulation such as touching and talking interaction.