Determining that a child has worms in the stomach usually has the following aspects: 1. roundworms are excluded by the digestive tract, such as the discharge of roundworms in the stool or vomiting out roundworms. 2. frequent anal itching and observation of pinworms crawling out near the anus at 4-5 a.m. 3. unexplained frequent abdominal pain. 4. bad skin and white spots on the face should also be suspected. 5. if prone to allergies, blood routine with significantly higher eosinophils. 6. laboratory tests The parasites such as roundworm eggs and pinworms are found inside the stool routine. All of the above can be suspected of having roundworms or pinworms, and usually have to go to the hospital for examination, which may require deworming treatment when the child is in a better state, and also need to pay attention to a light diet.