Roundworms in the stomach can be treated with oral deworming medication, while serious infections caused by roundworms need to be treated with surgery. 1. Oral deworming medication: Oral deworming medication is the most commonly used method for treating roundworms in the stomach. Usually, drugs such as Albendazole can be taken orally, so that roundworms can be killed directly in the stomach and intestines. Albendazole has adverse reactions such as dry mouth, fatigue, dizziness, etc. It is recommended to use the medication under the guidance of a doctor, and not to blindly use the medication on your own to avoid adverse effects. 2. Surgical treatment: roundworms in the stomach can lead to serious infections, resulting in complete intestinal obstruction and so on, if this kind of situation should be timely surgical treatment. If diagnosed with roundworms in the stomach, it is recommended to carry out standardized treatment as soon as possible to reduce the adverse effects of the disease. At the same time, the above medication should be used under the guidance of a doctor, avoid self-medication.