Only worms treatment will give you temporary results.  Causes to be found Outland, stopped and pathology should be broken for root cause results.  Chat or consult online for better results

Its a very common problem in kids .nothing to worry. Give him Krimihar ( ayurvedic medicine) Dhanvantri pharmacy - ( one tea spoon empty stomach in morning) - Buy Small( 100ml) OR You can do this:- take some neem leaves boil in to water on low flame for 10 min . and give him one or two time a day ( 1/4 of glass)

Consult ayurveda physician for proper diagnosis and root cause of ailment

With medicine problem will get solved. But if the causitive factors are continuing the problem will reoccur. Here the boy may have some contact with pinworm eggs may be from play school or from other sources. So after one month medication do control the situations of direct contact. And you have to practice some habits in diet too.

Again start the treatment

take proper knowledge about this first n our natural herbs it's curable consult me

Consult an expert for best advice

Take proper treatment its curable