Tendonitis was / is my worse symptom. (temporary blindness was , but thankfully that never came back). I wish this forum had mini forums with in it on specific subject matter. There are many posts on tendon and muscle pain. I,ve mentined this on several other related posts.
Pyhsical therapy, chiropractic, - do that all you want but with minimal results. To make the prior more effective you need to break down muscle adhesions and knots FIRST. Goggle Active Release Technique and find a provider because it works. Apply magnesium lotion after treatments. Stretch and do very light wieghts to rebuild muscle after the knots and adhesions are gone. NOTE: this is not recomended if your on any ABX that are known to cause tendinitis.
Myofacial release works better when knots and adhesions are gone too - you tube this foe glutes(but). Sit / roll on a hard ball no bigger than a base ball for 5 min at a time. It takes that long for knots to melt away, hurts first, feels better after 5 min.
this should help a lot , but not eliminate untill the infection is gone.