1. Start with the baby: Where the mother, aunt and other women in the immediate family have nipple invagination, the mother can gently lift the small nipple outward 1 to 2 times a day after the birth of a baby girl with a genetic predisposition. Note that the action must be gentle and it is best to ask an experienced person to operate. In this way, you can see that the baby’s nipples are green bean-shaped or small round pieces of skin, the chance of future nipple inversion is greatly reduced. 2, pay attention to clothing: intimate underwear should be cotton products, and frequent changes, sunlight exposure. If your nipples are red and cracked, your underwear should be sterilized by steaming, and you should not use bras too early in your teenage years. 3, to prevent extrusion: underwear, bras appropriate, not too tight, for women with larger breasts, more attention should be paid to the breast loose. For girls who have the habit of lying down, it is necessary to correct in time to prevent the nipples from being squeezed, so as not to aggravate the degree of nipple invagination. 4, regular medical checkup: prevention of breast diseases, nipple indentation is a signal suggesting breast diseases, mastitis, nipple inflammation, eczema-like carcinoma of the nipple, breast cancer and other diseases.