There are various methods of diagnosis of the heel spur and plantar fasciitis. Some are discussed below.Physical Examination -  Complete physical and medical examination is necessary to diagnose heel spur and plantar fasciitis.Medical History - Previous or past medical history Images Test - X-ray and MRI are imaging tests. In x-ray testing, X-ray images are used; x-rays are used and images of bones are taken. In MRI, magnetic fields are used and then images are taken.