1 year 3 months frequently waking up at night and crying with the environment, vitamin D deficiency and other reasons, according to the cause of the specific need for treatment, the main way of general treatment, medication, etc., specific as follows: 1. environmental factors: if the environmental factors cause 1 year old 3 months frequently waking up at night crying, such as the temperature is too high, too low, as well as the air is not smooth, etc., it is recommended to adjust the sleep environment, if necessary, you can turn on the air conditioning and humidifier, at the same time, the baby’s quilt should not be too thick, etc.. 2. Vitamin D deficiency: If calcium deficiency causes frequent waking up at night and crying, and a lot of sweating symptoms, it is recommended to take vitamin D and other medications under the guidance of a doctor, and more outdoor activities with the baby, more sunshine, to promote calcium absorption. In addition, 1 year and 3 months frequently wake up at night crying may have other reasons, it is recommended to go to the hospital for examination, the doctor to clarify the cause of the disease, and then give targeted treatment.