Plantar fasciitis is a tightening of the plantar fascia band connecting the toes to the heel bone. A condition of overuse and strain, plantar fasciitis develops gradually as the fascia band becomes increasingly irritated and inflamed, and sometimes torn. Over time, the damaged tissue grows tense and inhibits movement or causes pain and discomfort when called upon to stretch.
Plantar fasciitis is characterized by a sharp and stabbing pain at the bottom of the heel, especially first thing in the morning. The pain may decrease throughout the day as foot flexibilities increases.
Runners are particularly susceptible to plantar fasciitis symptoms, as well a painful secondary condition called heel spurs. When plantar fasciitis continues untreated, heel spurs form as calcium deposits where the plantar fascia band connects to the heel. Heel spurs may not cause pain themselves, but they are a strong diagnostic indicator of plantar fasciitis.