Severe pain from shoulder down deltoid into bicep. not rotator cuff. more pain when arm is rotated toward chest. torn cartilage in other shoulder. ??

Get examined!: At age 55 your most common cause for this pain would still be 'impingement' ( or bursitis). Labral tears causing this pain are less likely unless associated with the biceps 'anchor'( SLAP) lesions -- but less likely in isolation in your age group.Osteoarthritis can cause pain in this distribution . AC joint arthritis can also cause pain when rotating arm towards chest ( adduction). See an ORS! GL!