The presence of roundworms in the stomach can lead to symptoms such as xenophagia, abdominal pain, teeth grinding, and malnutrition. Failure to intervene in time may lead to complications such as intestinal perforation. 1. Symptoms: Some mild cases have no obvious symptoms. As the disease progresses, patients may develop loss of appetite or hyperphagia, xenophagia, periumbilical pain, teeth grinding, irritability, malnutrition and other manifestations. The heterogeneous protein of the worm may also lead to diarrhea, urticaria and other diseases in some patients. 2. Complications: If effective intervention is not carried out in time, complications such as intestinal perforation may be caused. Especially for children under ten years old, Ascaris lumbricoides intestinal obstruction may occur, which threatens the life safety of patients. For patients, once the above symptoms appear, they should consult a doctor as soon as possible to confirm the diagnosis and carry out targeted treatment under the guidance of the doctor.