I have a yellowish discharge with blood comin out of my right nipple what could this be?

Papilloma: Intraductal papilloma (ip) is the most common cause of bloody nipple discharge. They are usually noncancerous but can sometimes have abnormal cells or an early breast cancer. Once diagnosed on needle biopsy, they are usually completely removed with surgery. Since these are small, a small amount of tissue can be removed, so the breast is not deformed (also scar can be near nipple).

See your doctor: The bloody discharge is very worrisome. See your doctor to check it out. Bloody nipple discharge is worrisome for the possibility of cancer. It needs evaluated.