What is the Main Cause of Plantar Fasciitis?
The reason why the timing of your pain is part of the diagnostic process relates directly to the main cause of the condition:
Inflammation of the plantar fascia.
Okay, so what’s that, right?
Well, this is a fibrous band of tissue spanning the length of the foot and connecting the bottom of the heel to the bottom of the front of the foot.
The fascia supports your foot arch and helps absorb some of the force of impact (when your foot lands as you take a step).
When the plantar fascia endures excessive amounts of force, tiny rips develop in the tissue.
During periods of rest—like as you sleep at night—your body goes to work, mending the damage.
But when you wake or get up and start moving around, the repair work is negated as the tissue is ripped again—which is the source of the sharp pain you feel.
That is what happens inside your body, but how did the plantar fascia become inflamed in the first place?
Put simply: overuse.
While it is possible for this to happen in a single incident, acute trauma isn’t an especially common cause of this kind of heel pain.