Deltoid Strain

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Deltoid Strain 2017-12-10T00:39:12+00:00

Deltoid Strain

By Brian J. Ludwig, MD

Shoulder pain in an athlete is a very common malady. Pain in the shoulder can be debilitating for athletes of all ages and competition levels. One possible, but relatively uncommon cause of shoulder pain is called a deltoid strain.

What is the deltoid muscle and what does it do? 

deltoid strainThe deltoid muscle is a large muscle that encompasses the shoulder joint. The deltoid is divided into three different portions, or heads, the anterior (front), middle, and posterior (back) portions of the deltoid. The deltoid originates on the lateral aspect of the acromion and clavicle and then inserts on the lateral aspect of the humerus. Its major action is to abduct the arm (lift the arm out to the side of the body) as well as assist in forward elevation (lifting the arm out in front of the body). The deltoid is a very powerful muscle and is needed for all types of athletic endeavors. 

What is the difference between a strain and a sprain? 

Strains are injuries to muscles or muscle tendon units. Sprains are injuries to ligaments. Because the deltoid is a muscle, it can be strained, but not sprained.

What other injuries can mimic a deltoid strain? 

There are many injuries in the shoulder that can mimic a deltoid strain. At times, these injuries can be difficult to distinguish one from the other. Some other things that can be injured include: the rotator cuff, glenoid labrum, biceps tendon, acromioclavicular joint (AC joint), shoulder dislocations, shoulder fractures, and soft tissue contusion. Many of these injuries can be treated conservatively, however some of these injuries require surgical intervention and need to be evaluated by a sports medicine physician to determine the extent of the injury.

How does one get a deltoid strain? 

Deltoid strains can be caused by numerous mechanisms. Most commonly they result from overuse of the muscle without adequate rest. This can lead to discomfort in the area of the deltoid muscle with associated swelling and loss of function. A forced eccentric contraction of the shoulder (lengthening of the muscle belly while contracting), can lead to strain of the deltoid muscle (ie: doing a “negative “while weight lifting). Less commonly, a direct traumatic blow to the shoulder can cause a deltoid strain.


How are deltoid strains diagnosed? 

Deltoid strains are diagnosed by looking at the mechanism of injury and the symptoms the patient is having at the time of injury. A physical examination is imperative. Patients with deltoid strains can have pain with palpation of the involved area of the deltoid muscle belly. In more severe cases, with actual tears of the muscle, a palpable defect may be felt. The shoulder is also assessed for swelling and skin changes. Range-of-motion and strength testing are done to help confirm the diagnosis of a deltoid strain and rule out other possible diagnoses.

What imaging studies are needed in a patient with a deltoid strain? 

Depending on the mechanism of injury, no imaging studies may be needed. If there is concern for fracture or dislocation, radiographs of the shoulder may be indicated. Additionally, if there is concern for rotator cuff injury or a torn labrum, then a MRI of the shoulder, on rare occasions, may be necessary.

What are the different grades (severity) of deltoid strains? 

Deltoid strains are graded based on the severity of the injury. Grade I strains generally result in mild pain in the affected shoulder. Patients with grade I strains are able to use their shoulder and can lift their arms with minimal pain and are able to do push-ups without much difficulty. There will generally be minimal or no swelling. Grade II strains are the next level of severity. This level of injury represents a partial tearing of the deltoid muscle. A patient with a grade II strain will have increased pain in the shoulder. They may have difficulty doing push-ups or lifting their arm. There will generally be mild or moderate swelling. Grade III strains are the most severe. A patient with a grade III strain typically has tearing of the deltoid muscle belly. The patients typically have severe pain and dysfunction in their arm. They are not able to use their arm for activities and will have moderate to severe swelling.

How are deltoid strains treated? 

In general, deltoid strains are treated conservatively. For Grade I injuries, generally little treatment is needed. Initially, most patients can benefit from sports injury treatment using the P.R.I.C.E. principle – Protection, Rest, Icing, Compression, Elevation. Anti-inflammatory medications (ibuprofen) can be used to treat the pain symptomatically. Grade II injuries can be treated similarly. A brief period of physical therapy may be helpful to decrease pain and increase motion in the arm. Grade III injuries, the most severe, are treated with physical therapy and restricted activities. Only on the very rare occasion would surgery be needed for a deltoid strain. 

When to See the Doctor

Hundreds of athletes sustain acute injuries everyday, which can be treated safely at home using the P.R.I.C.E. principle. But if there are signs or symptoms of a serious injury, emergency first aid should be provided while keeping the athlete calm and still until emergency service personnel arrive. Signs of an emergency situation when you should seek care and doctor treatment can include:

  • Bone or joint that is clearly deformed or broken
  • Severe swelling and/or pain,
  • Unsteady breathing or pulse
  • Disorientation or confusion
  • Paralysis, tingling, or numbness

In addition, an athlete should seek medical care if acute symptoms do not go away after rest and home treatment using the P.R.I.C.E pprinciple.

Can Telemedicine Help?

Telemedicine is gaining popularity because it can help bring you and the doctor together quicker and more efficiently. It is particularly well suited for sports medicine, facilitating the diagnoses, treatment and prevention of sports related injuries both on and off the field. There are times when It can be very difficult to get an appointment with primary care doctors or specialists and Telemedicine can help to provide very quick treatment options. But if you prefer a more personal or face-to-face relationship, telemedicine might not be the option for you.

Though no service is perfect, telemedicine is a positive and growing medical treatment option. Studies continue to show that telemedicine saves time and money and seeing your primary care doctor after a telemedicine visit can always be set up to establish a second opinion.


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When can an athlete get back to sporting activities after a deltoid strain? 

Depending on the severity of the strain, athletes can return to a sport within in a day or two, or up to several weeks to months later. In order to safely return to athletic competition, the athlete must have regained all of their strength, as well as range of motion (ROM). After this has been regained, often sport specific exercises are initiated (such as a throwing program for the throwing athlete). Once the athlete is pain free, has full strength and ROM, and completed their sport specific exercises, if appropriate, then they may return to play without restriction. For minor, grade I, type injuries this can be done very quickly, whereas more severe grade III injuries may need several months of recovery. Return to play decisions should be determined under the guidance of a sports medicine professional and possibly an athletic trainer or physical therapist.

  • Great article..

  • Ciegech

    What about reoccurring strains?

  • SportsMD

    For reoccurring strains focus should be on recovery exercises and therapy. Rest alone will not heal completely and simply resting the shoulder does not insure the development of a mature, mobile scar tissue.. Range-of-motion exercises must be done twice daily to keep the joint loose. These exercises consist of moving the joint, carefully, as far as it can go in all directions. After pain has subsided, shoulder muscles must be strengthened to prevent bursitis/tendinitis from recurring. Range-of-Motion Exercises: Start with the “pendulum swing’.” Support yourself with your good arm. Keeping your knees slightly bent, bend forward at the waist and let your bad arm hang down (or dangle off the bed). Then make circles with your arm three to five times in one direction, then the other. Start with small circles and gradually make them larger. With palm out, place the hand of your injured arm behind your back and reach up as high as possible, as though you were going to scratch your back with your thumb. also consider Transverse Friction Massage which is an essential component in the treatment chronic cases. The beneficial effects of friction massage are not well understood, but is proposed that an increase in the mobility of the developing, or developed, scar tissue takes place without stressing the tendon longitudinally. All the best with your recovery.

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