The baby’s nighttime crying may be caused by physiological factors, or it may be caused by illnesses that cause physical discomfort. 1. Physiological factors: for example, the child eats too much before going to bed, too excited or the indoor temperature is too high, covered with too thick clothing may lead to the child crying at night. 2. Diseases: such as rickets, otitis media, parasitic infections, skin eczema, abdominal pain, etc.; because these diseases will lead to the child’s body is not comfortable, which is manifested in crying; but due to the disease, the child may also be accompanied by fever, vomiting, excessive sweating, local skin abnormalities and other manifestations. If your baby is crying at night, you should take him/her to the pediatrician’s office in the hospital and find out the cause of his/her crying and take reasonable treatment under the doctor’s guidance, so as not to affect the child’s development and the parents’ rest.