Plantar fasciitis is the most common source of heel pain and foot pain. Your plantar fascia is the tissue which runs along the sole of the foot towards the toes which help support the arch of your foot. It is the painful inflammation and irritation of this plantar fascia.
The major complaint of those with plantar fasciitis is foot pain or sore heel. This tends to develop gradually over time. It usually affects just one foot, but can affect both feet. The pain is usually worse in the mornings or after prolonged activity.