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Plantar fasciitis is a condition caused by inflammation of the plantar aponeurosis and is a common cause of heel pain. The diagnosis is clinical and investigations are generally not required. However, in certain cases such as an atypical presentation or where there is no response to treatment, the clinician may consider further investigation. This review article briefly introduces the condition and goes on to discuss the possible options for investigation. This includes evaluation and usefulness of such tests as blood evaluation, radiographs, ultrasound, bone scintigraphy, magnetic resonance imaging (MRI) and nerve conduction studies