The key is the mechanism of injury, the specific findings on physical examination, and the clinical information obtained from the diagnostic imaging studies. Plantar fasciitis is not an acute lesion, Achilles tendinitis is most probably not an acute lesion, however, there are findings relative to the Achilles tendon that could be acute. Ensure that you have a comprehensive clinical examination from the appropriate provider such as an orthopedic surgeon or a foot/ankle specialist with the appropriate clinical data. The most accurate clinical assessment can be made relative to the causation and relatedness to a compensable event.