Pain in Tricep Tendon. Please advise.

Thanks due asking me to respond. Straightening the elbow results in contraction of the triceps muscle, and in the presence of a small tear will cause pain. Folding the forearm normally relaxes the muscle and should not cause pain. However during weight training like with dumbbells, there is eccentric contraction of the triceps muscle and a tear in the muscle will still cause pain. A more common cause of pain in the elbow is tennis elbow where there is severe pain around the bony projection on the outer aspect of the lower elbow, but this does not involve the triceps muscle. But movements of the elbow joint will result in excruciating pain. The best course at the moment would be to rest the elbow. Ice it if it's swollen. Certainly you must avoid weight training for another 3 weeks at the least. If pain persists even after a week of ready, I would suggest you visit the nearest ortho surgeon who can examine the elbow and order the necessary tests to arrive at a diagnosis. Good luck!