This condition may be related to the infant’s own habits or may be caused by painful defecation. It is usually considered to be caused by dry stools, perianal lesions, gastrointestinal diseases and poor spleen and stomach functions. In this case, it is recommended to seek medical advice and use medication under the guidance of a doctor. For example, if the stool is dry, probiotic preparations such as Lactobacillus can be used to regulate the infant’s intestinal flora and promote the infant’s digestive function; for diarrhea, montelukast can be used to stop the diarrhea. Specific drug selection also needs to be selected by the doctor according to the examination results and after clarifying the cause. The common reasons are as follows: 1. Infants’ own habits: Some infants may simply resent defecation, as shown by crying and fussing during defecation and stopping crying after defecation is over. Parents should pay more attention to observe whether the infant has this situation every time he or she has a bowel movement, and if so, should help the infant change this habit by actively soothing him or her; 2. Dry stool: usually drinking too little water or the infant has poor digestion, resulting in the gathering of food and residue, causing dry stool, causing difficulties in defecation, or painful scratching during defecation, or hard stool scratching the anus, causing the infant to cry during defecation. In this case, parents are advised to take probiotics as prescribed by the doctor to regulate the intestinal flora and improve the dry stool situation. In addition, for infants with more serious conditions, they can be given a corked stool at the same time to relieve the dryness of the stool and assist in its discharge. In daily life, parents can appropriately give their babies more water to relieve dry stools, and can also gently massage the baby’s abdomen to help intestinal peristalsis and relieve indigestion; 3, perianal lesions: such as anal fissures, perianal cysts, pain caused by the friction of the lesion site, which can gradually aggravate, leading to the baby’s fear of defecation, crying when defecating, and relieved after defecation. 4. Gastrointestinal diseases: If the infant is infected with intestinal parasites causing gastrointestinal diseases, it can be accompanied by constipation or diarrhea and other symptoms, abdominal pain and pain in the anal area during defecation, which can be manifested as crying during defecation and relieved after defecation. It can be treated with deworming drugs as prescribed by the doctor; 5. Poor spleen and stomach function: some infants have accumulated food and have poor spleen and stomach function, resulting in slow intestinal peristalsis and stagnation of stool in the intestines, which may cause abdominal cramps in infants and cause them to cry. When the stool is expelled, the intestines are relaxed, the abdominal pain is relieved, and the infant stops crying. Usually, as the infant grows up, the bowel function can gradually develop and mature, and the symptoms can gradually be relieved. In daily life, parents can give the infant some easy-to-digest food or massage the infant’s abdomen appropriately to assist the infant’s digestion. In addition, if the infant cries when having a bowel movement, it is recommended that the family bring the infant to the doctor in time and assist the infant to develop good bowel habits and have regular bowel movements in life.