Usually when there are roundworms in the stomach, mild cases have no obvious symptoms, while severe cases may have symptoms such as abdominal pain, worms discharge, weight loss, etc. Confirmation of the diagnosis needs to be detected by fecal worm egg examination for roundworm eggs. 1. Abdominal pain: generally if the patient often feels abdominal pain for no reason, increased appetite, often feel hungry, there may be roundworms in the stomach. 2. Worm defecation: When the patient defecates, roundworms are occasionally found in the feces, it may also be that there are roundworms in the stomach. 3. Weight loss: If most of the energy absorbed by the body is absorbed by roundworms, it may lead to nutritional deficiencies and weight loss of the patient, which may be due to the presence of roundworms in the stomach. 4. Confirmation of ascariasis requires fecal worm egg examination, and the diagnosis can be confirmed if ascaris lumbricoides eggs are found. If suspected roundworm disease, you need to consult a doctor in time for relevant examination to make a clear diagnosis, to avoid delaying the condition.