Body appears roundworm infection is usually unclean food diet is contaminated by roundworm eggs, roundworms usually appear in the digestive tract, causing harm mainly includes two aspects: First, mainly affect the gastrointestinal tract, may cause enteritis, intestinal spasm, and even roundworm intestinal obstruction, in serious cases need surgery. Secondly, mainly biliary ascariasis, whose typical clinical manifestation is severe pain under the glabella, also known clinically as symptoms do not match the signs, that is, the symptoms are very serious, but the local signs are not obvious, there is no obvious abdominal pressure pain, rebound pain or signs of peritonitis, usually do ultrasound examination can confirm the diagnosis, treatment is generally used deworming treatment.