My FHL tendon sheath is inflamed should I inject it before my 100 mile trail race?

What if you were ramping up for several years to run 100 miles, but then you got tendinitis? If you start getting pain because you have been doing lots of hill repeats, you could get irritation of the FHL tendon and specifically the tendon sheath that surrounds it where it bends around the back of the ankle. One of the treatment options is to inject it with corticosteroids.  So, this runner called me and wanted to know whether or not it would be a good idea for her to inject the tendon sheath with cortisone before her trail race.  If my FHL tendon is inflamed and irritated, should I inject the tendon sheath before my 100-mile trail race?  Well, that is a great question and that is what we're talking about today on the Doc On The Run Podcast.