Symptoms of pediatric Ascaris lumbricoides mainly include cough, chest tightness, abdominal pain, intestinal obstruction, etc. Specific symptoms need to be analyzed according to the site of the attack, such as the lungs, intestines, biliary tract, etc. It is recommended that you consult with a specialist, and follow the doctor’s instructions for the use of medication. 1. Symptoms caused by larval migration: larval migration to the lungs can cause Ascaris lumbricoides eosinophilic pneumonia or Ascaris lumbricoides juvenile pneumonia, which can cause chest tightness, cough, blood sputum or asthmatic symptoms, and can disappear after 1-2 weeks. If it invades the brain, liver, kidney and eyes, it can cause convulsions, hepatomegaly, abnormal liver function and retinitis. 2. Symptoms caused by adult worms: adult worms are more likely to be parasitized in the intestinal tract, and there may be no obvious symptoms in mild cases. Infection in large quantities may lead to loss of appetite, polyphagia, xenophagia, etc., and paroxysmal subxiphoid drilling pain, and some patients may be depressed and grind their teeth, and in severe cases, growth and development may be affected. 3. Complications: the most common complication is biliary ascariasis, paroxysmal severe colic in the right upper abdomen, nausea and vomiting are typical symptoms, and bile or roundworms can be vomited. Ascaris lumbricoides intestinal obstruction can be paroxysmal severe pain around the umbilicus or the right lower abdomen, vomiting, abdominal distension, etc. Intestinal perforation and peritonitis or even sudden severe colic in the whole abdomen. It is recommended that parents give their babies good habits, do not eat raw food, vegetables and fruits should be cleaned and eaten.