Patients with soreness from the thigh to the knee may have this condition caused by trauma or strain. Pain in the thigh muscles may occur when the thigh muscles are strained during strenuous activity. Knee pain may also occur if the knee ligaments are damaged or the meniscus is damaged during strenuous activity. In addition, during strenuous activity, the body produces a large amount of lactic acid from anaerobic enzymes, and the accumulation of lactic acid in the muscles may also cause soreness in the leg muscles. In this case, the first thing to do is to rest, avoid straining and avoid strenuous activities. In addition, you can apply heat to the painful area to promote blood circulation, which can promote the metabolic decomposition of muscle lactic acid, thus relieving the symptoms of muscle pain. Massage can also be performed to relieve pain. In addition, non-steroidal anti-inflammatory and analgesic drugs such as Nimesulide or diclofenac sodium can be taken orally to relieve pain. You can also take oral Chinese medicine with the effect of activating blood circulation and removing blood stasis, which can also relieve the symptoms of leg pain. If the symptoms do not improve after a period of time with medication, it is also necessary to go to the hospital for an MRI of the knee joint to rule out meniscal damage. If this happens, surgery may also be required.