Two-year-old children always cry in the middle of the night because of fear, infection of parasites and other diseases. 1. Fear: If a two-year-old child changes to a new environment, nightmares in the first half of the night or parents are not around, because the bedroom is darker in the middle of the night after the lights are turned off, the child will feel scared, and will always cry because of the lack of security. 2. Infected with parasites: If a two-year-old child is infected with pinworms, roundworms and other parasites, because these parasites like to move in the night, in their activities, the child’s perianal or intestinal discomfort, so the child in the middle of the night will always cry. 3. other diseases: if the baby cold in the middle of the night due to phlegm blocked nasal breathing, due to indigestion and abdominal distension or appendicitis attack and abdominal pain, which will lead to the child due to discomfort in the middle of the night and always crying. Two-year-old children always crying in the middle of the night may also be related to other reasons, to go to the regular hospital in time to identify the cause of the disease, and under the guidance of a professional doctor to choose the appropriate method of treatment.