Sagging and soft breasts after breastfeeding can be restored by exercising the pectoralis major muscle properly, maintaining adequate nutrition and choosing suitable underwear. 1. Exercise properly: Strong pectoralis major muscle can enhance the beauty of the mammary glands, because the mammary glands grow on the pectoralis major muscle, if the pectoralis major muscle is very strong it will enhance the solidity of the mammary glands, and the pectoralis major muscle will support the mammary glands, which is beneficial to improve the flaccidity. 2. Maintain adequate nutrition: you need to provide enough protein, don’t just diet, you can reduce the intake of carbohydrates, but don’t reduce the intake of protein. 3. Choose suitable underwear: for example, bras can hold up the breasts better and do not let them sag naturally. It is recommended to have postpartum checkups on time and seek early medical treatment if there is any discomfort.