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Published on: 5/21/2025

Why does moving my arm across my chest cause pain?

Pain when moving your arm across your chest can be caused by issues like scapulothoracic bursitis or problems related to past treatments like radiotherapy.

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Explanation

When you feel pain while moving your arm across your chest, it might be due to a condition called scapulothoracic bursitis. This is when the area where your shoulder blade meets your chest wall gets irritated. This irritation can cause pain, especially when you move your arm.

Another possible reason for this pain could be past treatments like radiotherapy. Sometimes, after radiotherapy performed in the chest or upper arm area, people can develop shoulder and arm problems. This might make movements like reaching across your chest feel painful.

Possible Causes:

  • Scapulothoracic Bursitis: This condition involves inflammation in the area where the shoulder blade glides over the chest wall.
  • Radiotherapy Effects: Previous radiotherapy treatments can lead to issues that cause discomfort in the shoulder and arm.

If you are experiencing this kind of pain, it might be helpful to speak with a healthcare professional who can provide guidance specific to your situation.

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