My son has been pooping a lot for the past 3 days, its normal poo but more than usual he's 22 month's old could there be something wrong with him?

I doubt it: I can think of a lot of ways this might occur but none amount to a real problem. If he is otherwise fine, doesn't have diarrhea, fever, vomiting, abdominal pain, or blood in his stool, then I wouldn't worry. He may just be eating more, or differently, getting more active, or maybe got a little constipated for a day or so and now things are moving again.