Appendicitis is usually found based on a combination of symptoms such as pain in the right lower abdomen, signs such as pressure in the right lower abdomen, and ancillary tests such as blood tests and ultrasound. 1.Symptoms. Appendicitis, i.e. appendicitis, often presents with typical right lower abdominal pain or metastatic right lower abdominal pain, accompanied by nausea, vomiting, fever and other symptoms. 2. Signs. The right lower abdomen is often accompanied by fixed pressure pain or rebound pain, right lower abdominal muscle tension and other abnormal signs. 3. Auxiliary examination. Blood routine often shows elevated leukocytes, CT or ultrasound can find the appendix is enlarged, thickened and other abnormal manifestations. When there are various signs and symptoms similar to appendicitis in the population, the cause should be clarified under the guidance of the doctor as soon as possible, and active treatment should be carried out to avoid aggravating the situation and causing peritonitis, appendiceal perforation and other complications, which will bring adverse effects to the body.