The rotator cuff is a group of muscles and tendons that surround the shoulder joint, keeping the head of the upper arm bone firmly within the shallow socket of the shoulder. A rotator cuff injury can cause a dull ache in the shoulder that worsens at night. While rotator cuff injuries are common and increase with age, people often have many unanswered questions about their causes and treatment options. This Aivio provides answers in a secure environment. Learners benefit from the expertise of orthopedic specialist, Dr. Daniel Acevedo.