The symptoms of a rotator cuff injury include:
Intense pain, a possible snapping sensation and immediate weakness in your arm if the tear occurs as a result of an injury or collision
If the injury develops slowly due to overuse, you may experience mild pain at first that worsens over time
Pain when you are resting, particularly if you lie on the affected shoulder
Difficulty in performing functional day-to-day activities, such as combing your hair or reaching behind your back
Weakness in your arm
A cracking sensation when you move your shoulder in a particular way
Some rotator cuff tears are not painful