If a one-month-old baby always makes an effort to hold the red face, to see if the child has abdominal distension, whether there is difficulty in defecation and other conditions. If there is abdominal distension and difficulty in defecation, it is considered to be caused by abnormalities in digestive function. It is necessary to take the child to the hospital for a detailed examination, and abdominal ultrasound needs to be checked if necessary to rule out whether there is congenital megacolon as well as special lesions in the abdomen. It may also be a normal physiological behavior, not caused by disease, for example, when the child is stimulated by loud sounds, such as parents suddenly speak loudly, or hear beautiful music, the normal stretching of the child, or before defecation and urination, the child may make efforts to hold to the phenomenon of the red face, however, this situation will not affect the child’s sleep and play, does not affect the child’s growth and development, is a normal physiological phenomenon, does not require intervention. This is a normal physiological phenomenon and does not require intervention.