toddlers always put fingers into their mouth after playing with things or mud which causes stomach infection,even eating stale foods or indigestion causes infection which leads to loose stools.
Look at any change in your toddler's diet recently that he may be having a reaction to. I found with my son that if he had too much juice, it would give him looser stools.
Loose stools are mostly caused by something in a toddler's diet. Its from a stomach virus the may come from something inedible that he or she picked up or something he or she was given to eat.
