Foot soaking can promote blood circulation in the lower limbs. If foot soaking is accompanied by blood-activating herbs such as elongation herb and translucency herb, it can relieve the pain caused by degenerative knee joints. However, it has no therapeutic effect on degenerative knee joint lesions and can only alleviate the symptoms caused by them to a certain extent. The temperature should be appropriate when soaking feet, the temperature should not be too high, due to for diabetic foot patients, so as not to produce counterproductive. The temperature is also not necessarily too low, the temperature is too low will cause vasospasm in the foot, resulting in difficulties in blood return. Only the appropriate temperature can have a good effect on promoting blood circulation and relieve some of the symptoms, but still need to be standardized under the guidance of the doctor.