If the tendon at your heel is swollen, it might also help to immobilize the heel, i.e. not bend it so the tendon isn't sliding in its sheath. High heels might do the trick, if you have any. They have you walking with your heel lifted so the tendons in the heel area (especially achilles) are kept shortened. That was the trick a physical therapist told me, years ago when I had tendonitis in the achilles. I had to go out and buy some heels, hadn't ever owned a pair. The ones I bought were ugly and I haven't used them since, but I don't dare throw them away because they really did the trick.