Alyssa has seven tattoos. She has a sacred heart on her behind, a fairy kneeling in grass on her hip, rosary beads on her back, an angel on her left ankle, an Orobous (a snake biting its own tail) on...
Ouroboros.
Based on my research it is an Ouroboros, which depicts a dragon or snake swallowing it's tail and forming a circle. According to Alyssa Milano it stands for rebirth, which she got soon...