Chronic appendicitis in children may present with abdominal pain, poor appetite, weight loss, fever, fatigue, nausea, vomiting and other symptoms. 1. Abdominal pain: it is a common symptom of chronic appendicitis, and some children only have abdominal pain. Recurrent paroxysmal abdominal pain or abdominal pain lasting more than 48 hours is more common, mainly located in the right lower abdomen. 2. Poor appetite and weight loss: some children may suffer from indigestion and loss of appetite, and prolonged loss of appetite may cause weight loss. 3. Fever: children may have body temperature over 37.5℃. 4. Fatigue: a few children may have fatigue symptoms. 5. Nausea and vomiting: children may experience nausea and vomiting when the pain is severe. If a child develops the above symptoms, it is recommended to consult a doctor promptly for active treatment.