Disease: Mammary Duct Ectasia
Symptoms:            Inverted nipple       Inverted nipple   Inverted nipple A nipple that's always been turned inward (inverted) usually isn't a medical concern. But a nipple that has recently turned inward should be checked by a doctor.               Inverted nipple       Inverted nipple       Inverted nipple   Inverted nipple A nipple that's always been turned inward (inverted) usually isn't a medical concern. But a nipple that has recently turned inward should be checked by a doctor.          Inverted nipple   Inverted nipple A nipple that's always been turned inward (inverted) usually isn't a medical concern. But a nipple that has recently turned inward should be checked by a doctor.        Inverted nipple   Inverted nipple A nipple that's always been turned inward (inverted) usually isn't a medical concern. But a nipple that has recently turned inward should be checked by a doctor.     Inverted nipple   Inverted nipple A nipple that's always been turned inward (inverted) usually isn't a medical concern. But a nipple that has recently turned inward should be checked by a doctor.  Inverted nipple A nipple that's always been turned inward (inverted) usually isn't a medical concern. But a nipple that has recently turned inward should be checked by a doctor. A nipple that's always been turned inward (inverted) usually isn't a medical concern. But a nipple that has recently turned inward should be checked by a doctor. Mammary duct ectasia often doesn't cause any signs or symptoms, but some people experience:  A dirty white, greenish or black nipple discharge from one or both nipples Tenderness in the nipple or surrounding breast tissue (areola) Redness of the nipple and areolar tissue A breast lump or thickening near the clogged duct A nipple that's turned inward (inverted)  A bacterial infection called mastitis also may develop in the affected milk duct, causing breast tenderness, inflammation in the area around the nipple (areola) and fever. Signs and symptoms of mammary duct ectasia may improve on their own.