sebum
As your piercing heals, your body replaces old skin cells with new ones. This is GREAT news! A white discharge from your piercing means it is healing nicely and should be left alone.
DO NOT clean off the sebum - it sends important chemical messages back to the body so that it knows when to stop growing!
Usually, sebum discharge starts after about 3-4 weeks and lasts about 10-12 weeks.
Female nipple piercings and Dermal Anchors can produce sebum for much longer.
NOTHING TO WORRY ABOUT!