The philtrum (Latin: philtrum, Greek: φίλτρον philtron, lit. "love charm ''), or medial cleft, is a vertical groove in the middle area of the upper lip, common to many mammals, extending in humans from the nasal septum to the tubercle of the upper lip. Together with a glandular rhinarium and slit - like nostrils, it is believed to constitute the primitive condition for mammals in general.
what are the lines above your lip called
philtrum philtrum medial cleft