If your nipples are newly inverted, you must see your doctor. They could be an indication of mastitis, mammary duct ectasia, or an abscess less than your areola. Your mammogram report may note that you've dense breasts. Dense breasts have far more glandular and fibrous tissue and less fatty tissue. https://grok.com/share/c2hhcmQtMw%3D%3D_5ad6450c-533d-442c-a09c-9f7bce1babfb