If your nipples are newly inverted, you need to see your medical doctor. They might be a sign of mastitis, mammary duct ectasia, or an abscess less than your areola. But attending to know your breasts and dealing with your doctor when a thing seems new or amiss could help https://grok.com/share/c2hhcmQtMw%3D%3D_5ad6450c-533d-442c-a09c-9f7bce1babfb