Tennis elbow

Tennis elbow is caused by repeated forceful contractions of the wrist muscles of the outer forearm. This stress causes microscopic tears leading to inflammation of muscles, tendons and joint structure of the elbow including muscles, tendons, and the bony projections on the inside and outside of the elbow, where muscles of the forearm attach to the bone of the upper arm. Pain and tenderness are felt usually across the two bony projections, either side of the elbow, and they increase with gripping or rotation of the wrist and forearm. If the condition becomes chronic, a decrease in grip strength can develop.