I’ve had insertional tendinitis for over 3 years and have been sent through a raft of incorrect diagnoses. I initially went to a podiatrist who gave me some stretches to perform (eccentric steps 1 & 2 from the directions here) and saw no improvement………obviously seeing as the diagnosis was incorrect. Later after completely stuffing my achilles up on hardfloor courts, i went to the GP who said i had IT and needed to see a physio or sports podiatrist to get sorted. I went to the physio and all seems to be recovering well for the first time in 3 years. That bulge on my right heel is also growing smaller. He said it would take 6 months plus to get it back to health again though.