The common clinical causes of soreness down the knee are mainly the following: First, when the patient is exercising the muscles of the lower limbs, due to the lack of muscle relaxation, it will cause a large amount of lactic acid accumulation and cause soreness symptoms below the knee. At this time, the patient can promote local lactic acid absorption faster through local massage and physiotherapy, external application of hot aman pack, moxibustion strip fumigation, and external application of blood circulation and stasis cream to reduce pain symptoms; second, the patient accidentally fell during strenuous exercise, which can cause soft tissue damage below the knee and soreness symptoms, at this time, the patient can reduce tissue exudation through local ice, and apply external application of hot aman pack after 24 hours, and take oral swelling and pain, and After 24 hours, the patient can apply local ice to reduce the tissue exudation, and take oral medications such as swelling and pain, blood circulation and blood stasis pills to promote faster relief of the pain below the knee.