Babies crying at night can be divided into two types of cases, one is instinctive physiological crying and the other is pathological crying that causes pain or discomfort, which needs to be judged separately and in detail. I. Physiological crying: hunger, fright, the environment is too cold or too hot, nightmares and other reasons, will make the baby feel uncomfortable and loud crying, usually after feeding, adding or removing clothing, parents soothing can be relieved, restore calm, this situation does not need to worry too much, you can sleep before the baby emotional soothing, while ensuring that the baby sleep environment comfortable. Parents need to be patient to find the cause of the pain and observe whether the child has symptoms such as bloating, diarrhea, blood in the stool, redness and swelling of the limbs, etc. If the symptoms are mild and there are no systemic symptoms such as fever, rash, asthma, etc., you can be patient to find the cause first. If the baby cries more than once, accompanied by other systemic symptoms, you need to seek medical treatment in time to avoid delaying the disease; 2. Other discomfort: If the baby lacks sunshine, or the diet lacks calcium and other nutrients, it may lead to the baby’s nervous excitement due to calcium deficiency, manifested as easy to wake up at night, crying more than once, screaming, shaking head, sweating, pillow baldness, etc.. In severe cases, the baby may suffer from bone dysplasia, such as square skull, cranial softening, rib cage exostosis, etc. You can check the blood calcium to determine whether there is a deficiency and the degree of deficiency, and supplement calcium under the guidance of the doctor, do not blindly take drugs or health products on their own, so as not to affect the absorption of other trace elements. You can bring your baby to outdoor activities to supplement sunlight and promote calcium absorption. In addition, babies who feel itchy due to allergies, eczema, mosquito bites, or fever caused by colds or gastroenteritis may also cry loudly, and need to be dealt with according to the cause, such as external use of children’s prickly heat powder, flower lotion, etc. to stop itching, wipe with a wet towel for physical cooling, high fever requires timely medical attention.