Having roundworms in the stomach is a bad phenomenon, and having roundworms in the stomach is called ascariasis, which is a condition caused by the onset of roundworm parasites after poor hygiene, mostly occurring in children. Ascariasis must go through the development of roundworm eggs when it is infected, and the eggs exist in unclean places or object surfaces, and children do not wash their hands after contact, which can easily lead to roundworm infection. After roundworm infection will cause the following damage to the body: 1. It will lead to malnutrition because roundworms can absorb a large amount of nutrients inside the human intestine, which will lead to malnutrition in the human body. The children or adults suffering from roundworm disease will often appear yellow and thin, fatigue, malnutrition and other conditions. 2, roundworms in the intestinal tract after parasitic can also lead to biliary colic, into the appendix to cause a series of acute abdominal manifestations.