Achilles? That form of tendonitis is common and vexing. You might need to stop cycling for awhile to recover. That tendon is prone to inflammation and even rupture for us aging weekend warriors.

My bias, based on no profound insights: avoid surgery. Avoid injections (ouch). NSAIDs help. Opioids help you forget how much it hurts. When we get old, rest is best. A good physical therapist might help, as no injury exists in a vacuum: if you walk funny because of ankle pain, then you knee, hip, and lower back will also hurt right up the line. You might need LESS saddle time, sad to say.

I knackered up my neck and right shoulder by, of all things, playing the cello. I masked the pain with analgesics. That was stupid. Now I've had to give up the instrument for the foreseable future. Warning to the wise.