<s>[INST] hi ,im from philipinnes.and i working here in hkg.i just want to ask my 1 yr old grand son, 2x already found a small worm in his stool,is it the food,milk or he swallow some dirt things ,hes very active baby,i just want to know what medicine i can give to him. thank you very much and god bless [/INST] Usually, worm infestation of this kind is due to ingestion of worm eggs with food or when they are lodged inside the untrimmed nails of a child. These are most likely pin worms. The adult worms reside in the children gut and after the female is fertilized, she emerges out of the anus at night to lay her eggs. This routine produces anal itching, which the child does to relieve his itch. The newly laid eggs then get stuck inside the children. If he does not practice proper hand-washing, the eggs will be ingested with his next meal, and these eggs will give birth to new babies inside the children gut. To treat pin worms, give a 3-day course of MEBENDAZOLE 100 mg twice a day after meals. An important thing to do is to REPEAT the same course after 15 days. Mebendazole is available world-wide in the form of a syrup (suspension) as well as chewable and normal tablets.  </s>