Technically, the true cause of plantar fasciitis is unclear. In 2003, one study suggested that it involves the degeneration of the plantar fascia.
However, what we do know is that the plantar fascia is meant to absorb the intense strains and stresses we put on our feet when running, walking, or playing sports. However, sometimes, too much pressure from these activities can damage or even tear the tissue in your feet. When tissue damage happens, your body’s natural response is to inflame the area. That inflammation usually causes the intense stiffness and pain associated with plantar fasciitis.
Another cause of plantar fasciitis is the overuse and overstretching of the plantar fascia ligament. If you’re between the ages of 40 and 70 and you pride yourself on being an active person, you’ve got a higher chance of developing this painful foot malady.