I've had tendon issues for several years, and there's never been any external swelling...just a lot of pain. I had tennis elbow so badly a couple of years ago that I couldn't lift a cup of coffee with my right arm. It was from overuse, though, so at least I had an explanation.

The tendon that is giving me fits now is my left distal bicep tendon, and I wasn't do ANYTHING that could have possibly caused it. It was the middle of January...no gardening, no golf, no kayaking, nothing. I'd shoveled snow once a week or two before, but that was it.

I've recently started on D3, so I'll have to see if that helps. After some Googling, I've seen indications that tendon issues can be caused by a D3 deficiency. Thanks for mentioning it.