There are many reasons for nipple sagging, which may be caused by ageing, excessive weight loss, oversized breasts, breastfeeding, etc. If necessary, you can go to the hospital for targeted treatment. 1. Ageing: With age, the breast skin and ligaments become loose and sagging, resulting in more loss of breast fat and shrinkage of breast glands, leading to loose and sagging nipples. 2. Excessive weight loss: due to dieting and weight loss, the skin of the breasts does not contract in time, so that the breast skin loses elasticity, which will lead to loss of breast support and cause nipple sagging. 3. Excessive breast size: When the breasts are too large, the breasts will sag due to gravity, thus causing nipple ptosis. 4. Breastfeeding: The stimulation of estrogen and prolactin during pregnancy and breastfeeding leads to breast enlargement and nipple ptosis. It is recommended to avoid wearing too tight underwear, keep your mood happy, eat more collagen-rich food and strengthen your breast exercise. When there is obvious discomfort, you can go to the hospital in time for consultation and treatment.