Plantar fasciitis is one of the most common causes of heel or arch pain. It involves inflammation of a thick band of tissue that runs across the bottom of your foot and connects your heel bone to your toes (plantar fascia). Plantar fasciitis commonly causes stabbing pain that usually occurs with your first steps in the morning.
As you get up and move, the pain normally decreases, but it might return after long periods of standing or when you stand up after sitting. Poor footwear may be a cause of injury, but often it is due to a weakness in the foot. Stretching and strengthening exercises can reduce the time frame of recovery.