Frequent crying at night in 10-month-old babies may be related to a poor sleeping environment, or it may be caused by indigestion, vitamin D deficiency rickets and other reasons. 1. Bad sleep environment: 10-month-old infants are in a sleep environment that is noisy, or if the indoor temperature is too high, resulting in overheating of the baby, it is easy to cause discomfort, and the phenomenon of frequent crying at night will occur. 2. Indigestion: 10-month-old infants gastrointestinal digestive system development is still not sound, if the parents feed improperly, a one-time to the child to feed too much milk, or add too much complementary foods, easy to cause the child indigestion, resulting in abdominal distension, abdominal pain, which will cause frequent crying at night. 3. Vitamin D deficiency rickets: 10-month-old infants grow and develop faster, if parents fail to reasonably give their children vitamin D supplementation, it is likely to induce vitamin D deficiency rickets, which can easily lead to increased neural excitability, resulting in restless sleep at night, which may show the phenomenon of frequent crying at night, accompanied by excessive sweating, occipital baldness and other symptoms. 10-month-old infants cry frequently at night, may also be caused by other reasons, if accompanied by obvious symptoms of discomfort or crying can not be relieved, you should take your child to the hospital in a timely manner, after diagnosis of the cause of the disease, by the doctor’s guidance for treatment and conditioning.