Under normal circumstances, your plantar fascia acts like a shock-absorbing bowstring,
supporting the arch in your foot. But, if tension on that bowstring becomes too great, it can
create small tears in the fascia. Repetitive stretching and tearing can cause the fascia to become
irritated or inflamed. The causes of plantar fasciitis can be:
Physical Activity Overload
Plantar fasciitis is common in long-distance runners. Jogging, walking or stair climbing also can
place too much stress on your heel bone and the soft tissue attached to it, especially as part of
an aggressive new training regimen. Even household exertion, such as moving furniture or large
appliances, can trigger the pain.
Some types of arthritis can cause inflammation in the tendons in the bottom of your foot, which may
lead to plantar fasciitis.
Although doctors don't know why, plantar fasciitis occurs more often in people with diabetes.
Faulty foot mechanics
Being flat-footed, having a high arch or even having an abnormal pattern of walking can adversely
affect the way weight is distributed when you're on your feet, putting added stress on the plantar
Shoes that are thin-soled, loose, or lack arch support or the ability to absorb shock don't protect
your feet. If you regularly wear shoes with high heels, your Achilles tendon - which is attached to
your heel - can contract and shorten, causing strain on the tissue around your heel.