Pain at the root of the lower side of the breast during breastfeeding: In the first case, the pain at the root may occur because the woman’s breasts produce more milk and the breasts are larger, which presses on the lower side of the root of the breast for a longer period of time. In the second case, it is possible that women’s underwear is too tight, resulting in poor local blood circulation to the breasts and causing pain at the root of the lower side of the breast. The second is that a woman’s underwear should be loose and comfortable when she has pain at the root of her breasts, so that she does not press too much on her breasts. If the pain at the root of the breast is more severe, women should go to the hospital for a mammogram if necessary, and give the appropriate treatment under the guidance of the doctor.