These are two terms that get thrown around frequently, yet sound similar, so what's the difference? 'Itis' is a term meaning inflammation while 'osis' is a term that means abnormal state. Like many conditions there is an acute phase and a chronic phase. More studies are suggesting that as time progresses (months) and the symptoms of Plantar Fasciitis persist, which most commonly include sharp heel pain and weight-bearing pain along bottom of the foot, this chronic phase lose