My tendonitis was caused by over enthusiastic Scottish country dancing.
Oh dear!
I've seen a couple of podiatrists over this, and have been doing the exercises as prescribed, although at one point I was doing the tendon stretching somewhat over-enthusiastically and managed to give myself a stress fracture in one of the foot bones. *
.
And the orthotics I was originally prescribed left not quite enough room in my shoes for my feet, so my blister count went through the roof. But by then I had learned the stern lesson that Foot Pain Must Not Be Ignored, and have since worn more appropriate orthotics.
I was used to walking several miles a day with the dogs and for a while I just carried on as best I could, with shorter and shorter distances, even though the pain was intense, and I would have to take umpteen stops every walk, and then tiptoe home slowly, because the pain was so bad. I just carried on regardless, because I am stupid like that, until a dear friend said 'Enough!' and dragged me to see a podiatrist for an assessment.
The fact it's dragged on so long is probably my own fault. I have no comprehension of the words 'rest, and take things easy'. Looking back because my ridiculous feet are on the far end of some distribution curve, I just got used to putting up with the pain caused by breaking in 'new shoes'.
Yes I've learned my lesson now!
I'm so glad you are now back to dancing, and that your tendons are well again
*aggravated by tripping over a headphones cable because I was not looking where I was going, whilst running in flip flops.