About subacromial and subcoracoid impingement
Impingement describes pain that comes from tendons and the bursa being squeezed as the arm moves. Subacromial impingement occurs under the bony roof at the top of the shoulder. Subcoracoid impingement occurs at the front, between a small bony hook called the coracoid and the upper arm bone.
Impingement is often a sign that the shoulder is moving or loading unevenly rather than a fixed structural problem. Weak rotator cuff muscles, poor shoulder blade control, and sudden jumps in overhead activity are common contributors, and they respond well to training.
Common symptoms
- Pain on the front or side of the shoulder
- A painful arc when raising the arm between shoulder and head height
- Pain reaching across the body or behind the back
- Night pain when lying on the affected side
- Aching after overhead work, swimming, or throwing
Common causes and risk factors
- Weak or fatigued rotator cuff muscles
- Shoulder blade movement that does not keep pace with the arm
- Sudden increases in overhead training or work
- Bone spurs or a hooked shape of the acromion
- Rotator cuff tendinopathy that thickens the tendon
How we diagnose it
Dr. Chen uses movement testing to find where and when the pain appears, then uses dynamic ultrasound at the exam table to watch the tendons and bursa as the arm moves. This shows whether the bursa is thickened, whether the tendon is irritated or torn, and which space is involved. X-rays may be used to check bone shape and spurs.
How Propel treats subacromial and subcoracoid impingement
Most people improve with a structured strengthening program for the rotator cuff and the muscles that control the shoulder blade, along with short-term changes to the most provoking movements. The aim is to build tolerance for overhead activity, not to avoid it.
When pain limits progress, Dr. Chen may offer an ultrasound-guided injection into the bursa to calm inflammation so rehab can continue. For tendons that stay painful, PRP can support tendon healing and improve pain and function. If a significant tear or a structural problem is found that does not respond, we help coordinate a surgical referral.
What to expect at your visit
- 1.
We listen first
Your visit opens with a real conversation: how the problem started, what you have already tried, and the activity you want back.
- 2.
Exam and in-office ultrasound
A hands-on exam, then ultrasound at the exam table, often while you move, so your physician can see the tendon, joint, or nerve involved.
- 3.
A clear diagnosis and plan
You leave knowing what is wrong and what your options are, from strength-based rehab to procedures, and why we recommend each one.
- 4.
Treatment and follow-through
Most procedures happen here in the office. We coordinate with your physical therapist and check progress against the goals you set.
Questions about subacromial and subcoracoid impingement
- Is shoulder impingement the same as a rotator cuff tear?
- Not exactly. Impingement describes pinching of the tendons and bursa, while a tear is damage to the tendon itself. Long-standing impingement can go along with tendon wear, and ultrasound can check for both.
- Will shoulder impingement go away on its own?
- It can, but it usually settles faster with targeted strengthening and activity changes. Symptoms that last more than a few weeks are worth an evaluation.
- Do I need surgery for impingement?
- Most people do not. Rehab and, when needed, a guided injection or PRP help the large majority. Surgery is considered only when careful conservative care has not worked.