Should I Worry About a Bump on My Left Shoulder? - Rehabilitation

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There is a protruding bone on the left shoulder?


Hello Doctor: When I look in the mirror, it's very noticeable that there is a prominent bony protrusion above my left arm.
After checking on Google, it seems to be near the upper trapezius and acromion of the left shoulder.
I have been exercising consistently over the past few months, including intermittent workouts and push-ups, which have caused some muscle fatigue.
I also watched yoga stretching videos, but some of the poses are too difficult for me, and I tend to push myself too hard.
I'm unsure if this is related to my stretching or if the protrusion has always been there without my noticing.
Currently, I do not experience any discomfort, and it hasn't affected my daily life.
Should I see a doctor about this situation? Can I continue exercising, or is it something I should not worry about? Thank you.

Lao Pi, 40~49 year old female. Ask Date: 2020/08/04

Dr. Su Hongci reply Rehabilitation


Hello: The issue you raised needs to be confirmed through a personal examination.
Please visit a nearby rehabilitation or orthopedic medical facility for an evaluation.
Wishing you good health!

Reply Date: 2020/08/04

More Info


When it comes to noticing a bump on your left shoulder, particularly if it appears to be a prominent bone or muscle structure, there are several factors to consider before determining whether you should be concerned or seek medical advice.

Firstly, it's important to understand that the human body is not perfectly symmetrical. Many individuals have slight variations in bone structure, muscle development, and fat distribution between the left and right sides of their bodies. The prominence of a bone, such as the acromion (the bony projection on the shoulder blade), can be more noticeable in some people due to their unique anatomy or muscle tone. If you have been engaging in regular exercise, particularly strength training and push-ups, it is possible that muscle hypertrophy (growth) could contribute to the appearance of a bump or protrusion.

In your case, the bump you are observing on your left shoulder could be attributed to several benign factors:
1. Muscle Development: If you have been exercising regularly, particularly with movements that engage the shoulder and upper back muscles, it is possible that the trapezius or deltoid muscles have become more developed on that side. This can create a more pronounced appearance of the shoulder.

2. Postural Changes: Sometimes, muscle imbalances or postural habits can lead to one side of the body appearing more prominent than the other. If you tend to favor one arm during workouts or daily activities, this could lead to asymmetry.

3. Injury or Strain: If you have been pushing yourself too hard in yoga or other stretching exercises, it is possible to strain muscles or ligaments, leading to swelling or changes in muscle tone. However, you mentioned that you do not experience any discomfort, which is a positive sign.

4. Bony Prominence: It is also possible that what you are feeling is simply a normal anatomical variation. The acromion process, which is part of the shoulder blade, can sometimes be more prominent in certain individuals.

Given that you are not experiencing any pain, discomfort, or functional limitations in your daily activities, it may not be necessary to seek immediate medical attention. However, if you notice any changes in the bump, such as increased size, pain, or if it begins to affect your range of motion or daily activities, it would be wise to consult a healthcare professional.

In the meantime, you can continue your exercise routine, but consider incorporating a balanced approach that includes stretching and strengthening exercises for both sides of your body to promote symmetry. If you are concerned about your form during yoga or strength training, consider consulting a fitness professional who can provide guidance on proper techniques and help you avoid injury.

In summary, while it is natural to be concerned about changes in your body, the bump on your left shoulder is likely a benign anatomical feature, especially given your active lifestyle. Monitoring the situation and maintaining a balanced exercise regimen should serve you well. If any concerning symptoms arise, don’t hesitate to reach out to a healthcare provider for further evaluation.

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