Hardness at the wound site after breast surgery is mainly due to the healing that occurs through scarring at the wound site after surgery and can feel hard. The hardness of the wound after breast surgery is usually due to the presence of a residual cavity from the surgery, which needs to heal through scarring, which eventually forms at the wound. However, it is important to note that when the skin is regrowing, there may be an overgrowth and buildup of collagen fibers that can cause keloid scarring. Particularly, some people with keloid body may experience scarring after the surgery, and it is recommended to apply some scar removal products in time. Meanwhile, it should be noted that during the operation, we should also try to avoid the infection of the incision and the excessive stretching of the wound, because the infection of the wound and the increase of the tension of the incision will easily lead to the formation of keloid scars.