What Causes Pain Behind the Knee?

Frequent calf extension and flexion activities such as swimming and kicking can easily cause lesions at the starting point of these muscles and cause pain in the back of the knee. Sudden flexion of the knees or fixation of the feet and ankles causes the calf to twist suddenly, which can also cause acute injuries at the origin of these muscles. Understand the characteristics of pain: the location, extent, and duration of pain; factors that increase pain; factors that alleviate pain; and other factors related to pain. It may also have something to do with the way and amount of activity you usually do.