This site provides information on the more common causes of shoulder pain and symptoms, treatment and prevention. Always seek a proper diagnosis from a qualified physician. Please do not attempt self-diagnosis.

See a doctor immediately if the shoulder is hot or swollen, if there is severe pain, it there is numbness, if fever is present, or if the arm cannot be lifted straight out to the side.

internal rotation with dumbbell start positionShoulder pain should not be ignored. Early treatment can prevent further injury and chronic shoulder problems. Pain in the shoulder may also be referred from other areas of the body, e.g. disc problems the neck.

The structure of the shoulder joint allows more range of motion than any other joint in the body.

The shoulder actually has several joints that work together to allow a wide range of motion. Most injuries occur at the “main” shoulder joint, where the head of the upper arm meets the shoulder blade; the term “shoulder joint” refers to this joint.

The head of the upper arm bone sits on a very small and shallow socket in the shoulder blade. This allows for the shoulder’s wide range of motion but makes it susceptible to injury. Because there is little bony stability, the shoulder relies greatly on connective tissue (e.g. ligaments, tendons, muscles) to hold the bones of the joint together and to stabilize the joint.

Causes of Shoulder Pain

The Most Common Cause of shoulder joint pain is  rotator cuff tendonitis – injury and inflammation of the tendons (rotator cuff tendons) that envelope the shoulder joint –  is most commonly caused by overuse of the shoulder. A torn rotator cuff may be caused by an accident or fall but can also occur during  everyday activity if there are degenerative changes of the rotator cuff caused by chronic inflammation (tendonitis) and/or age.

Muscle strain is common in the muscles that run over the shoulders to the neck . It is often the result of slouching or holding the shoulders in a raised position for long periods of time.

Other painful shoulder conditions, such as frozen shoulder, may occur for no apparent reason. (The risk of frozen shoulder increases when the shoulder is not used enough after a painful injury). The cause of calcium deposits in the shoulder, which may trigger episodes of acute inflammation of the tendons, is also unclear. Arthritis sometimes occurs in a previously injured shoulder joint.

Risk Factors

Weak Rotator Cuff Muscles

If the muscles that stabilize the shoulder joint (mainly the rotator cuff muscles) are weak or fatigued, the muscles fail to fully stabilize the joint. If the head of the upper arm bone is not kept in place in its socket, abnormal force is placed upon tissue surrounding the shoulder joint and can lead to injury. Shoulder tendonitis and bursitis are common.


Shoulder pain is frequently caused by chronic overuse of the shoulder. The shoulder may become injured suddenly from a blow or fall, but gradual injury from chronic overuse of the shoulder is more common. Repetitive lifting, pushing, pulling, throwing, and especially overhead activities may lead to injury. Pain may be mild and intermittent in the beginning and worsen over time. Combining repetitive overhead activities with force increases the risk of injury further (e.g. stacking heavy objects on a high shelf).

Repetitive overhead activities can be particularly damaging. When the arm is raised overhead, the head of the upper arm bone migrates upward on the shoulder socket somewhat and rotator cuff tendons come into contact with the roof of the shoulder blade. Repeated contact and friction of the rotator cuff tendons often leads to irritation and inflammation of the tendons (tendonitis).

A strong rotator cuff helps keep the head of the upper arm bone from riding up excessively but some contact between the rotator cuff and bones in the joint still occurs with overhead activity. The bursa that lies under the roof of the shoulder blade may also be affected and become inflamed (bursitis). Shoulder bursitis often occurs along with shoulder tendonitis.


Aging is a major factor in rotator cuff injuries Tendons lose elasticity with aging and they become more susceptible to injury. Muscle mass also decreases with age. Both the rotator cuff muscles and tendons can be strengthened with  exercises.

Prevention of Shoulder Pain

Overuse shoulder injuries often can be prevented.

Weak rotator cuff muscles may be unable to adequately stabilize the shoulder joint. Rotator Cuff Exercises can help. Building up strength of the rotator cuff through exercise helps to stabilize the shoulder joint to prevent abnormal pressure on the soft tissues surrounding the joint. The muscles that control the shoulder blade also play a role in stabilizing the shoulder joint.

Avoid repetitive overhead activities. If you are involved in activities that involve repetitive overhead movements, take frequent breaks. Fatigued rotator cuff muscles lose the ability to keep the shoulder stabilized.

Avoid doing too much too soon. If you are going to engage in any overhead activity you haven’t done for a long time, such as getting back into playing tennis, endurance must be built up slowly. Exercises to strengthen the muscles you will be using in an activity reduce the chance of injury.

Warm up before engaging in sports such as swimming, tennis or throwing sports that require overhead movement.

Proper form for your sport should be learned and practiced to prevent injury.

Maintain proper posture. Keep shoulders down, back and relaxed.

Treatment of Shoulder Pain

Prevent major problems by treating minor problems early. If a minor injury is not given a chance to heal before it is subjected to the same activity, pain and inflammation may become chronic.

Treatment of shoulder pain depends on the cause – seek a proper diagnosis from a qualified physician. Most shoulder injuries heal with conservative treatment. Healing takes time. The time it takes to recover depends upon several factors, e.g. the severity of injury, the type of injury, how quickly one heals, how early one begins treatment.

Typical treatment of shoulder pain (for most conditions) involves a combination of rest (not complete rest), exercise, anti-inflammatory medication, applying cold or heat to the shoulder joint and, in some cases, an injection of steroids into the shoulder joint.

Doing activities that aggravate shoulder pain often cause further damage, delay healing, and may lead to long-term problems. However, not using the shoulder at all weakens the shoulder and leaves it more vulnerable to injury. Immobilizing the shoulder may also lead to frozen shoulder. Stretching exercises may help prevent this condition.

Strengthening exercises for the muscles that support the shoulder, particularly the rotator cuff (the muscles and tendons that dynamically stabilize the main shoulder joint) are a major part of treatment for most shoulder injuries, but strength training before adequate healing has taken place may cause further pain and injury. A physician or physical therapist can determine when the shoulder is ready for shoulder strengthening exercises. Shoulder Exercises can help prevent injury from recurring.

Massage therapy is also used to treat many soft tissue injuries. From muscle strain to tendonitis to frozen shoulder, massage therapy increases circulation, speeds healing, improves range of motion and relieves pain.

Surgery may occasionally be required (depending upon the type of and severity of the injury and symptoms). Surgery may be performed to tighten loose ligaments, repair a torn tendon, remove a calcium deposit, trim a damaged tendon, etc. when conservative treatment doesn’t adequately resolve symptoms.

Diagnosis of Shoulder Pain

Many shoulder conditions have similar symptoms and it may be difficult to diagnose the problem from symptoms alone. A physician, often an orthopedist, diagnoses the cause of shoulder pain by taking into consideration the patient’s symptoms and medical history, findings of a physical examination and sometimes diagnostic testing, such as x-rays, a CT scan, or an MRI.

The information on this website is for information purposes only, and is not intended to be used to diagnose or treat any medical condition.