What Is The Treatment Of Stool Problem In Children ?

My 3 1/2 month old has been having greenish, sometimes clear watery stools for 6 days now. He acts completely fine, nursing as normal, wet diapers and everything. But he poops around 6 times a day with the stinky watery stools. He was put on azithromycin around a week and a half ago and 3 days later he started with this watery stools. I was just wondering if the antibiotics are the cause of his stools. His teeth have been bothering him also so I didn't know if that had anything to do with it too. I am not too concerned with all this except I don't know if it will eventually pass or if he needs to see his pediatrician.