Hi. My son is 3 yrs old and has LOTS of bowl movements during the day, but for the last 4 mos or so, he s been experiencing weird bm s with greater frequency- usually very rank, varying from heavy tar-like brown, to light green/tan runny, and often lots of clear/yellow foamy mucus. He has also developed geographic tongue. Otherwise he is asymptomatic. We ve noticed when we vacation at the grandparent s house, his bm s are completely normal after one day but the tongue breaks out, while it is vice versa as soon as we get home. Could this be an allergy or water quality problem? I m just at a loss as to what is causing this, but not concerned enough to visit the ped since he seems to be fine otherwise. Thanks for any insight you might have on this.