my baby is 4 month 22 days old he is passing watery stools from 15 days even after treatment tell me what can I do for stopping that

A. Get a stool test done for your child this is going to clear the picture about the situation as to what is the reason behind it and shift to non-lactose milk because you must be giving milk continuously which is not letting the diarrhoea subside rather aggravating the problem