Scab on nipple

Hi,

I am 23 years old. About 3/4 days ago i noticed a scab just above my right nipple. Its not itchy, its a little shiny and a bit black/purple looking. It left some residue (im assuming puss) on my bra. It isnt painful although i can feel that something is there. No lumps or anything and its the first time i had this. No itchyness, no flakeness, no redness.

please advise, is this something to be worried about?

thanks in advance.