Knee pain during breastfeeding is mainly due to two reasons: 1. It may be due to the fact that after childbirth, the knee joint often holds the child and bears more force, after a long time it is easy to lead to soft tissues around the knee joint, such as muscles, ligaments, tendons and other structures, excessive fatigue and formation of strain, will form local inflammatory lesions, stimulate the peripheral nerves, there will be pain, in addition to fatigue generated by 2. Due to the weakness of the postpartum period, the knee joint is susceptible to cold, which causes the soft tissues around the knee joint to become more tense and the blood circulation to slow down, leading to a gradual increase in inflammation and the accumulation of metabolites such as lactic acid, which stimulates the peripheral nerves and also aggravates the pain. This will also increase the pain.