How can you naturally get rid of poop stuck in stomach?

Go to a doctor in Mexico or a doctor he'll subscribe a medicine called lactilax or whatever it is called. Me myself I am 10 I was born with something called allergic to gluten so poop gets stuck on my belly this medicine has changed my life but I stopped taking it and bigot worse so now I'm taking it again. ( btw when you drink the medication don't do exercise in the morning )