I now think I have Proximal Hamstring Tendinopathy (PHT), [aka: upper/proximal/high hamstring tendonitis/tendinopathy] whereas my initial self-diagnosis was ischiogluteal bursitis (IGB).
This guy’s story is almost identical to my own and it took him two or three months to get better. He points out, and I agree, that it can be hard to distinguish this condition from ischio-gluteal bursitis (IGB) because the ischiogluteal bursa lies between the hamstring tendon and the ischial tuberosity.
Back view of pelvis & thigh
In the end the diagnosis doesn’t really matter because the main treatment is the same: rest until pain-free and resume exercise only when it doesn’t provoke pain. One possible difference in management between IGB and PHT is that there’s probably no role for anti-inflammatory medication in the case of tendinopathy.
I am resting . . .