Intestinal parasites is it possible for them to come out of you partially but not completely? i think i feel only the tip of it and it goes back in.

Your GI symptoms: Are likely from the parasites. Your doctor or gastroenterologist can give you something to expel the via bowel movements. Many are microscopic and thus not seen or felt. They go through cycles of breeding so you need to expel not only the live parasites but also the eggs and this takes a month or two. Peace and good health.