This document provides information about plantar fasciitis, including its definition, anatomy, epidemiology, etiology, pathophysiology, clinical features, differential diagnosis, investigations, and management. Plantar fasciitis is a painful condition caused by inflammation of the plantar fascia, which supports the arch of the foot. It is commonly caused by overuse from sports or occupations requiring prolonged weight bearing and walking. Conservative treatments include rest, stretching, strengthening exercises, orthotics, and night splints.