This is a very basic summary from webMD, may help, may not, but good luck in healing! I know tendonitis can be EXTREMELY uncomfortable!

"The basic treatment for tendinitis is rest and ice for several days, then heat, gentle massage, stretching, and finally strengthening. Anti-inflammatories are often given, and other modalities include acupuncture, electric stimulation, whirlpools, and more."

Another common practice would be to implement some sort of splinting device.:thumbsup: