A full-term child crying all the time may be caused by physiological factors such as hunger, diapers not changed in time, or considered to be caused by intestinal spasms, intussusception and other diseases. 1. Physiological factors: Since full-term children can’t speak yet, when there is excessive hunger, diapers are not changed in time, the environment is too hot, etc., and they can’t express themselves, they will cry all the time. 2. Intestinal spasm: the etiology of intestinal spasm is not yet clear, it may be caused by improper diet, gastrointestinal gas accumulation, environmental stimuli and other factors. The child may have paroxysmal acute abdominal pain, paroxysmal crying and difficult to appease, accompanied by facial flushing, abdominal distension and other symptoms. 3. Intussusception: Intussusception is mainly caused by abnormal intestinal peristaltic rhythm. The child will have persistent abdominal pain, paroxysmal aggravation of the situation, manifested as a full-term child has been crying. Full-term children cry all the time, there may be other reasons, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.