Some patients with Ascaris lumbricoides do not have obvious features, while some patients will have abdominal pain, loss of appetite, emaciation, diarrhea and other symptoms. 1. Abdominal pain: generally manifested as pain around the navel, and the pain is not intense, and it will be relieved by rubbing the abdomen appropriately, but some patients may cause severe biliary colic because roundworms enter the bile ducts. 2. Wasting: As roundworms parasitize the intestines, the nutrients cannot be absorbed well by the intestines, thus malnutrition occurs, resulting in wasting of the patient. 3. Diarrhea: When roundworms cause serious intestinal infections, they often cause diarrhea, and there may be worms or eggs in the stool. People with roundworms may also have other characteristics, if there are the above characteristics, it is recommended to go to the hospital in time, after a clear diagnosis and timely treatment.