Read below about pain in one shoulder, including causes and common questions. Or get a personalized analysis of your pain in one shoulder from our A.I. health assistant. At Buoy, we build tools that help you know what’s wrong right now and how to get the right care.

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A.I. Health Assistant Causes for Pain in One Shoulder

Updated on Aug. 29, 2018

The list below shows results from the use of our A.I. Health Assistant by Buoy users who experienced pain in one shoulder. This list does not constitute medical advice.

  1. 1.Rotator Cuff Tendonitis

    Impingement syndrome is a common shoulder condition seen in aging adults. The tendons of rotator cuff muscles, whose action is to rotate the arm such such as during a tennis swing, pass in a narrow space between two bones in the shoulder. When the space becomes too narrow, which can happen as a result of an overuse injury, pain may develop as the tendons rub against the bones.

    Impingement may take weeks to months to settle.

    Rarity:
    Common
    Top Symptoms:
    pain in one shoulder, dull, achy shoulder pain, shoulder pain that gets worse at night, difficulty moving the shoulder, shoulder pain from overuse
    Symptoms that always occur with rotator cuff tendonitis:
    pain in one shoulder
    Urgency:
    Primary care doctor
  2. 2.Frozen Shoulder (Adhesive Capsulitis of the Shoulder)

    Adhesive Capsulitis or "Frozen shoulder" is when the shoulder is painful and loses motion because of inflammation.

    1.5 - 3 years, but 90% recover fully without treatment

    Rarity:
    Common
    Top Symptoms:
    spontaneous shoulder pain, stiff shoulder, dull, achy shoulder pain, shoulder pain that gets worse at night, difficulty moving the shoulder
    Symptoms that always occur with frozen shoulder (adhesive capsulitis of the shoulder):
    stiff shoulder
    Urgency:
    Primary care doctor
  3. 3.Shoulder Strain

    Shoulder strain, also known as a muscle pull, is a common occurrence attributed to a damaged muscle and often is the result of heavy lifting or sports.

    With proper medical attention, this condition should fully resolve.

    Rarity:
    Uncommon
    Top Symptoms:
    pain in one shoulder, pain in the front of the shoulder, shoulder pain from overuse, shoulder pain from an injury, sports injury
    Symptoms that always occur with shoulder strain:
    pain in one shoulder
    Symptoms that never occur with shoulder strain:
    arm weakness, arm numbness
    Urgency:
    Phone call or in-person visit
  4. 4.Biceps Tendonitis

    The biceps is the muscle in the front of the upper arm. Its main action is to flex the arm. The beginning of the muscle is a tendon that passes in front of the shoulder. Problems with the tendon can arise due to impingement (where the tendon gets compressed by surrounding structures) or inflammation due to overuse of the shoulder. People with this condition experience a deep, throbbing ache in the front of the shoulder.

    Recover on its own within weeks to months.

    Rarity:
    Rare
    Top Symptoms:
    pain in one shoulder, pain in the front of the shoulder, spontaneous shoulder pain, dull, achy shoulder pain, shoulder pain that gets worse at night
    Symptoms that always occur with biceps tendonitis:
    pain in the front of the shoulder
    Urgency:
    Primary care doctor

    Pain in One Shoulder Checker

    Take a quiz to find out why you’re having pain in one shoulder.

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  5. 5.Repetitive Strain Injury of the Shoulder ("Swimmer's Shoulder")

    Repetitive strain injury of the shoulder is caused by consistent repetitive use.

    Resolves with rest

    Rarity:
    Uncommon
    Top Symptoms:
    shoulder pain from overuse, shoulder weakness, shoulder numbness
    Symptoms that always occur with repetitive strain injury of the shoulder ("swimmer's shoulder"):
    shoulder pain from overuse
    Symptoms that never occur with repetitive strain injury of the shoulder ("swimmer's shoulder"):
    severe shoulder pain, shoulder injury
    Urgency:
    Self-treatment
  6. 6.Non - Specific Shoulder Pain

    The shoulder is made up of many ligaments and several bones. Shoulder pain is often not identifiable because of how complicated a joint it is.

    1-2 weeks

    Rarity:
    Common
    Top Symptoms:
    shoulder pain
    Symptoms that always occur with non-specific shoulder pain:
    shoulder pain
    Urgency:
    Self-treatment
  7. 7.Pinched Nerve in the Neck

    With age, disks separating the cervical vertebrae (which are the bones of your spine in your neck) lose height as well as lose water content, becoming stiffer. The vertebrae move closer together, and nerves that exit between these bones may be pinched, causing pain to travel down the nerve as it passes through the arm. The pain is usually sharp, and some people report a "pins and needles" sensation or even complete numbness.

    Majority of patients get better with time (weeks to months).

    Rarity:
    Common
    Top Symptoms:
    pain in one shoulder, spontaneous shoulder pain, pain that radiates down arm, pain in the back of the neck, severe shoulder pain
    Urgency:
    Primary care doctor
  8. 8.Shoulder Arthritis

    Arthritis is inflammation of one or more of the joints. Pain, swelling, and stiffness are the primary symptoms of arthritis. Any joint in the body may be affected by the disease, including the shoulder joint.

    Shoulder arthritis is a chronic problem once it develops.

    Rarity:
    Uncommon
    Top Symptoms:
    spontaneous shoulder pain, shoulder pain that gets worse at night, difficulty moving the shoulder, swollen shoulder
    Symptoms that always occur with shoulder arthritis:
    spontaneous shoulder pain
    Urgency:
    Primary care doctor
  9. 9.Acromioclavicular (Ac) Shoulder Joint Injury

    The shoulder is made up of three bones - the shoulder blade (scapula), collar bone (clavicle), and arm bone (humerus). The acromioclavicular (AC) joint is a joint that is in the front of the shoulder, where the collar bone and shoulder blade meet. This joint is stabilized by ligaments, which can tear if the two bones are separated from one another. This is most commonly caused by falling on the shoulder.

    Pain goes away in 3 weeks in most cases (6-12 weeks for more severe injuries)

    Rarity:
    Rare
    Top Symptoms:
    constant shoulder pain, pain in one shoulder, shoulder pain from an injury, shoulder pain near the end of the collarbone, difficulty moving the shoulder
    Symptoms that always occur with acromioclavicular (ac) shoulder joint injury:
    shoulder pain near the end of the collarbone, constant shoulder pain
    Urgency:
    Primary care doctor

Questions Your Doctor May Ask About Pain in One Shoulder

  • Q.How would you explain the cause of your shoulder pain?
  • Q.Can you fully move your shoulders around?
  • Q.Where exactly is your shoulder pain?
  • Q.Did you just suffer from a high impact injury (e.g., a fall, collision, accident or sports trauma)?

If you've answered yes to one or more of these questions, try our pain in one shoulder symptom checker to find out more.

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Pain in One Shoulder Symptom Checker Statistics

  • People who have experienced pain in one shoulder have also experienced:

    • 8% Pain in One Arm
    • 5% Pain in the Back of the Neck
    • 3% Pain in the Upper Arm
  • People who have experienced pain in one shoulder had symptoms persist for:

    • 36% Over a Month
    • 23% Less Than a Week
    • 19% Less Than a Day
  • People who have experienced pain in one shoulder were most often matched with:

    • 37% Rotator Cuff Tendonitis
    • 37% Frozen Shoulder (Adhesive Capsulitis of the Shoulder)
    • 25% Shoulder Strain
  • Source: Aggregated and anonymized results from visits to the Buoy AI health assistant (check it out by clicking on “Take Quiz”).

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