4-year-old children with pain around the navel and itchy anus need to be treated, considering that it may be caused by roundworms in the intestines, it is recommended that timely treatment be carried out, if it is not timely and effective treatment, it may affect normal growth and development. Children with roundworms in the stomach may be due to accidental ingestion of roundworms and other parasitic worm eggs, the infection pathway is mainly caused by contaminated hands or ingested unclean fruits and vegetables and other food. Ascaris infections generally appear abdominal pain, abdominal distension, anal itching and other symptoms, you can use albendazole tablets and other drugs under the guidance of the doctor for treatment, if you do not see any improvement after taking the drug, it is recommended to go to the hospital in a timely manner, to carry out a full range of checks and then symptomatic treatment. Usually pay more attention to wash your hands before and after meals, and when you eat raw fruits and vegetables, you must wash them clean, and some foods even need to be scalded with hot water before eating them. And must pay attention to diligently cut nails, strengthen hand hygiene.