I have major problems with tendinitis, in most joints, including my elbow. Here is what I have learned about it:
- you need to get the inflammation down. It tends to get into a viscous cycle, where you get inflammation from the initial injury, but then because your injury is inflamed, you get more pressure and more pain, which makes it more inflamed...etc. So rest, ice, and anti-inflammatories are the first thing you should do.
--You can get scar tissue buildup around the tendon- especially if you have had a lot of swelling (the swelling sort of solidifies into solid tissue). This can sometimes aggravate things.
A couple of therapys I tried that helped with both the pain and inflammation and scar tissue were "active release therapy" (chiropractors or massage therapists are usually the people who get certified int this- it is hard to explain, and it isn't pleasant, but it works quite well), acupuncture, or just a chiropractic adjustment. It might surprise you. but I had the most success with a chiropractor. He started off just adjusting the joint (it was my ankle, not my elbow), but he was also certified in acupuncture. The acupuncture worked really well for pain and inflammation, but eh adjustments helped me with my range of motion and scar tissue.
However, none of those things really worked long term for me, but I think that was because the Lyme kept bringing the tendinitis back. So if you have tendonitis from an injury, this could help, but if it is caused by Lyme, I think it could help alleviate the symptoms, but probably won't fix the problem for good.
Tendons are tough ones though. They often go into such confined spaces that any inflammation causes a lot of problems