Hi,
Thank you for asking question on health care magic.
Your history suggests that he is suffering from threadworm infection.
Ivermectin 200 micrograms/kg body weight as a single dose is the drug of choice.
sometimes you have to repeat once more to eliminate infection.
Personal hygiene like cutting the nails short, washing hands thoroughly before eating,washing under garments with hot water and drying under the sun is of prime importance.
Treating simultaneously all the household contacts is a must.
You may use
cyclopam syrup for control of pain abdomen and anntihistamine like
Piriton syrup for itching.
Hope this answer will serve your purpose
Please feel free to ask any more queries if required
Take care
Dr.M.V.Subrahmanyam MD;DCH
Associate professor of pediatrics