How can you tell if you have a bad rotor cuff and what is it

Shoulder pain: Rotator cuff disorders come in degrees of damage such as one or more tendon involvement, partial or complete tears. Occasionally just inflammation is present. Symptoms include pain on motion causing mild or severe limitation of range of motion, difficulty sleeping because of pain when lying on the shoulder. An MRI is diagnostic, but many orthopedic surgeons make the diagnosis by simple examination