User:ZZhang031/sandbox

Supernumerary nipples are presented in any shape and size along the milk line at birth, and it affects more males than females. It commonly presents as a 2-3 mm hyper-pigmented spot below the breast, chest, or abdomen at birth. However, supernumerary nipples can also occur on face, neck and back. The supernumerary nipple can start growing by responding to hormone changes during adolescence, and it can produce milk during pregnancy. Supernumerary nipples might associate with kidney and vertebral malformation.