In adults, appendicitis is the first thing that comes to mind when there is shifting right lower abdominal pain (i.e., pain that starts in the upper abdomen and then shifts to the lower right abdomen, where the pain is fixed). However, this is not the case for children, especially infants, who are unable to express the site of pain and only show crying and restlessness. Families and doctors can only guess the location and severity of the disease from the child’s crying and the position taken by the child during abdominal pain. When appendicitis occurs in children, they usually prefer to lie on their right side with their legs slightly flexed to reduce pain. Because the appendix is on the right side, lying on the left side will move the appendix and increase the pain, so children will not lie on the left side. The child also chooses the position that feels good to him and refuses to change it, which can cause him to cry if forced to do so. The nausea, vomiting and diarrhea that occur in pediatric appendicitis are much more severe than in adults. Especially in infants and children aged 3 to 4 years, nausea and vomiting often come first and abdominal pain and diarrhea come second. Diarrhea also occurs more often than in adults. The reasons for this are: first, the appendix is longer in children, and the inflamed appendix stimulates the rectal wall to contact, thus causing diarrhea; second, pediatric appendicitis is more likely to perforate, and pus accumulation in the pelvic cavity can also stimulate the rectum and cause defecation. But often the amount of stool is not much, only a small amount of thin mucus stool, and sometimes there may be blood in the stool, so it is often misdiagnosed as bacterial dysentery, delaying the disease. In pediatric appendicitis, the body temperature rises to 38-39°C, and the younger the age, the higher the temperature. In conclusion, the symptoms of pediatric appendicitis are very atypical, so families should think about the possibility of appendicitis when they encounter noisy and unsettling abdominal pain in infants and children, as well as unexplained vomiting and fever. If you find that your child has abdominal pain, parents should patiently check, you can hold the child in your arms, and then gently touch the abdomen, while touching the child’s expression, when the examination to the painful parts, the child will appear painful expression, scream pain or push the adult’s hand away, and the abdominal muscles are tense and hard, this is the performance of acute peritonitis; you can also try to take the child’s own hand to touch the abdomen, when touching the painful parts will put the small hand retracted. However, these tests need to be repeated several times to be of value. In acute appendicitis, as long as the inflamed appendix is removed promptly, the child can usually be cured within a week of hospitalization. However, in pediatric patients, especially infants and children, the treatment is different from that of adults. Since the inflammatory process in pediatric patients is faster and more intense than in adults, necrosis and perforation can occur early. This is due to the fact that the omentum of pediatric patients is not as short as that of adults, and the short and thin omentum cannot wrap the inflamed appendix, so perforation can easily occur and lead to peritonitis. According to statistics, the incidence of appendiceal perforation in children can be 30-40%, so early warning of appendicitis and peritonitis is very beneficial to the control of the disease.