The best way

The best way to relieve tendonitis is to stop doing anything that irritates the body part in question — a simple step for the weekend tennis player or morning jogger, but not as easy for the manual laborer, office worker, or professional athlete.
The most effective conventional and alternative treatments for tendonitis have the same basic premise: Rest until the pain disappears, then massage to relieve stress and tension in the muscles, and exercise to strengthen the area and prevent re-injury. If you must go back to whatever caused the problem in the first place, be sure to warm up for at least 5 to 10 minutes with gentle stretching and movement before starting any activity. Take frequent breaks.
Conventional medicine offers an assortment of treatments for tendonitis, from drug injections to surgery, but the pain will never go away completely unless you stop stressing the joint. Re-injury is inevitable without adequate rest.