The biceps tendons attach the biceps muscle to the bones in the shoulder and the elbow. Biceps tendons can begin as a partial tear, but as the damage progresses it may become a complete tear. A complete tear can damage other parts of the shoulder, such as the rotator cuff. Injury and overuse generally cause biceps tendonitis. Symptoms include sudden, sharp pain in the upper arm, an audible pop, cramping, bruising, pain, tenderness, weakness, and limited movement in the shoulder.