1. Abdominal pain: the typical abdominal pain of acute appendicitis is metastatic right lower abdominal pain. At the beginning is often epigastric pain ("heart" pain), similar to gastric disease, or pain around the navel. After a period of time, the abdominal pain is transferred to the lower right abdomen, after which the point of abdominal pain is relatively fixed. Since the location of the appendix is not the same for everyone, the pain point will be slightly different. In some people, there is no metastatic process, and the right lower abdominal pain is present at the onset of the disease. The time of metastatic abdominal pain varies from person to person, as fast as 2~3 hours, as slow as 1 day or longer.

2. Nausea and vomiting: Because the appendix is stimulated by inflammation and activity enhancement, often cause gastrointestinal reaction and nausea and vomiting. Most of them vomit once after a few hours of abdominal pain, but frequent vomiting does not occur.

3. Fever: There is no fever in the early stage of abdominal pain. The temperature rises when inflammation is evident, and is higher when inflammation worsens.