The baby wakes up frequently crying at night may be related to indigestion, vitamin D deficiency, pinworms and other factors. 1. indigestion: baby due to small stomach capacity, gastrointestinal tract power poor, gastric acid and pepsin secretion less physiological characteristics, such as dinner eating too much, food is difficult to digest, so that the baby bloating discomfort, resulting in frequent waking up at night crying. 2. Vitamin D deficiency: baby’s growth and development process, the body needs a lot of vitamin D and calcium, otherwise it can lead to vitamin D deficiency rickets, the early stage of the disease has a neurological excitability enhancement of the performance of the baby night terrors. 3. Pinworms: the disease is a kind of intestinal parasitic disease, because the pinworms have the characteristic of crawling out of the anus at night to lay eggs, so after the baby sleeps, there can be anal itching, which seriously affects the baby’s sleep, and may lead to night waking up frequently crying. The baby woke up frequently crying at night may also have other reasons, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, to give targeted treatment or treatment.