Patients with knee and calf pain, triggered by the following reasons: 1, osteoarthritis: seen in the knee joint degeneration, osteoarthritis patients are prone to knee pain, accompanied by soreness and pain in the back of the calf. 2, injuries: seen in the knee and calf injuries, the patient will also be swollen knees and calves, pain, limited activities. 3, muscle, fascia, ligament strain: seen in the knee, Muscle, fascia, ligament strain in the calf area is also easy to cause knee and calf pain. 4, lumbar disc herniation: it is also easy to cause knee and calf pain. After the patient appeared knee and calf pain situation must consult the doctor, see what is the cause of triggering, for the cause of treatment, to relieve the symptoms of knee and calf pain. Avoid standing for a long time, squatting, running, jumping, hiking, climbing stairs to avoid aggravating the pain.