Acute appendicitis in babies is a more common acute abdominal condition, and although its incidence is lower than that of adults, babies with poor body resistance at this time are more dangerous than adults, and in severe cases, it can even lead to diffuse peritonitis or appendiceal perforation, which can even be life-threatening. The baby’s acute appendicitis is often characterized by crying, fever, abdominal pain and pallor, which can easily be misdiagnosed as gastroenteritis, thus delaying treatment, so parents need to be aware of the early symptoms of acute appendicitis in babies. The typical presentation of acute appendicitis is a pain in the upper and middle abdomen that will shift to pain in the lower right abdomen after a few hours, often in the form of paroxysmal or continuous distension or dull pain. It is important to note that in case of appendiceal perforation, the abdominal pain will be relieved, but the disease has increased, requiring parents to pay sufficient attention. The gastrointestinal symptoms of simple appendicitis are not prominent and may include reflex gastric cramps leading to nausea and intermittent vomiting, as well as increased bowel movements due to perirectal inflammation, and abdominal distention and continuous vomiting due to peritonitis and intestinal paralysis. If the temperature exceeds 39°, perforation, necrosis and peritonitis may occur, and if chills or jaundice occur, purulent portal phlebitis may be a complication. Acute appendicitis in a baby may cause significant pressure pain in the right lower abdomen, and the baby may be reluctant to move, preferring to lie on the right side with the knees bent, and walking with a bent waist. The baby’s appendix is higher and more mobile, and the pressure point is usually located in the upper part of the body. In addition, the baby’s body immunity is insufficient, the upper respiratory tract is easily infected, and these diseases will be the cause of the onset of acute appendicitis in babies, so babies usually have upper respiratory tract infection first and then acute appendicitis, which needs to be treated early.