My sons poop smells very sour and so does it breathe I am googling (which is bad I know)🙄 but it’s…

My sons poop smells very sour and so does it breathe I am googling (which is bad I know)🙄 but it’s saying possible lactose intolerance. Any ones baby have the same and baby be lactose intolerant? It also says other stuff I plan on bringing it up to his doctor but just wanting to know if anyone else has had this problem! TIA