Is it from teething??

Jamesha

My (formula fed) (teething) baby is 4 months old... in the past few days I noticed that she is pooping a lot, her poops look yellow and dark green-but she’s very active, screaming and smiling, with all this going on her butt is red but I continue to put diaper paste. . In the last 10 hours, she has pooped 4 times. She has no fever, doesn’t look dehydrated, when she cries; she has tears.