Shoulder Pain: What Is a Slipped Biceps Tendon?
You reach up to grab something off a high shelf, or you take your first swing of the golf season, and there it is, a sharp catch or pop in the front of your shoulder. Maybe it happens again when you reach behind you to grab your seatbelt, or when you lift a gallon of milk out of the fridge. If you've started to notice a clicking, snapping, or grinding sensation in the front of your shoulder along with pain that seems to come and go with certain movements, you may be dealing with a slipped, or subluxating, biceps tendon.
At Homberg Chiropractic & Wellness, we see a fair number of patients, especially weekend athletes, golfers, swimmers, and people whose jobs involve a lot of overhead reaching, who come in with this exact complaint. It is often misdiagnosed or dismissed as "just a strain," but a slipped biceps tendon has a specific cause, and it responds well to the right kind of hands-on care.
What Is the Biceps Tendon, and Where Does It "Slip"?
Your biceps muscle actually has two tendons that attach it to the shoulder: the short head and the long head. It's the long head of the biceps tendon we're talking about here. This tendon travels up from the muscle, crosses over the front of the shoulder joint, and runs through a narrow groove in the humerus (the upper arm bone) called the bicipital groove, or intertubercular groove. From there, it attaches inside the shoulder joint itself, near the labrum.
That groove is lined with a strong band of connective tissue called the transverse humeral ligament, along with fibers from the subscapularis and supraspinatus tendons, which act like a sling to hold the biceps tendon securely in place as your arm moves. Think of it like a rope running through a pulley system. As long as the pulley (the groove and its supporting ligament) is intact and properly aligned, the rope glides smoothly with every movement.
A "slipped" biceps tendon happens when that stabilizing sling is compromised, often due to injury, repetitive overhead strain, or degeneration of the surrounding rotator cuff tissue. The tendon partially or fully pops out of its groove during certain arm positions, especially rotation combined with elevation. This is medically referred to as biceps tendon subluxation or instability, and in more severe cases, it can progress to a full dislocation of the tendon.
What Causes a Biceps Tendon to Slip?
There are a few common contributing factors we look for during an evaluation:
- Rotator cuff involvement: The subscapularis tendon, in particular, forms part of the roof over the bicipital groove. When it is torn, strained, or weakened, it loses its ability to help hold the biceps tendon in place.
- Repetitive overhead motion: Swimmers, throwing athletes, tennis and golf players, and people who do repetitive overhead work (painters, electricians, warehouse workers) place repeated stress on this area, which can gradually wear down the stabilizing structures.
- Direct trauma: A fall onto an outstretched arm, a car accident, or a sudden yank on the arm can injure the transverse humeral ligament directly.
- Postural and biomechanical issues: A rounded-forward shoulder posture, restricted mid-back mobility, or altered shoulder blade mechanics (scapular dyskinesis) can change the angle at which the humerus sits in the shoulder socket, putting extra shear stress on the biceps groove.
- Age-related degeneration: As with many tendon and ligament structures, wear and tear over the years can weaken the sling that holds the tendon in place, especially after age 40.
Common Symptoms
A slipped or unstable biceps tendon tends to produce a fairly recognizable symptom pattern:
- A distinct clicking, popping, snapping, or grinding sensation in the front of the shoulder, often felt rather than heard
- Pain localized to the front of the shoulder that can radiate down into the upper arm along the biceps muscle
- Symptoms that worsen with specific movements: reaching overhead, reaching across the body, or rotating the arm (like turning a doorknob or reaching into a back seat)
- Tenderness when pressing directly over the bicipital groove, roughly at the front of the shoulder near the top of the arm
- A feeling of weakness or instability when lifting or carrying
- In some cases, a visible or palpable shift of the tendon as the arm moves through certain positions
Because these symptoms overlap with rotator cuff tears, shoulder impingement, and labral injuries, it is easy for a slipped biceps tendon to be lumped into a generic "shoulder pain" diagnosis without anyone identifying the true source.
How We Evaluate It
When a patient comes to our Knoxville office with this kind of shoulder complaint, we start with a thorough history and movement assessment. We are listening for the specific mechanics that trigger the pop. Is it with rotation, with lifting, with reaching behind the back? We palpate directly over the bicipital groove to check for tenderness and any palpable movement of the tendon. We also assess the rotator cuff, the scapular mechanics, and the mobility of the thoracic spine and shoulder joint as a whole, because a slipped biceps tendon rarely occurs in isolation. It is almost always tied into a larger pattern of shoulder or rotator cuff dysfunction. Special orthopedic tests, such as Speed's test and Yergason's test, help confirm biceps tendon involvement specifically.
How Chiropractic and Functional Rehabilitation Can Help
The good news is that many cases of biceps tendon instability respond well to a conservative, hands-on approach rather than jumping straight to surgery. Our treatment approach typically includes:
- Chiropractic adjustments: Restoring proper motion to the shoulder joint, thoracic spine, and shoulder girdle helps normalize the mechanics that may be contributing to the tendon's instability.
- Soft tissue work: Targeted myofascial work around the biceps, subscapularis, and surrounding rotator cuff muscles can help reduce tension and improve the gliding function of the tendon within the groove.
- Functional rehabilitation exercises: Strengthening the rotator cuff, particularly the subscapularis, along with scapular stabilizers, helps rebuild the "sling" support around the biceps tendon so it tracks properly again.
- Radial pressure wave therapy or cold laser therapy: These modalities can help calm inflammation in the tendon and surrounding tissue and support the healing process for damaged connective tissue.
- Activity modification guidance: We'll talk with you about which movements to temporarily avoid or modify, and how to gradually reintroduce overhead or rotational activity as your shoulder strengthens.
Left unaddressed, a slipped biceps tendon can lead to ongoing inflammation of the tendon (biceps tendinitis), and over time, repeated subluxation can contribute to fraying or even rupture of the tendon. That is why we encourage patients not to ignore that popping or catching sensation, even if the pain itself is mild or intermittent.
When to Seek Care
If you are noticing a popping, catching, or grinding feeling in the front of your shoulder, especially if it is joined by pain that flares with overhead reaching, throwing, or rotating your arm, it is worth having it evaluated. The earlier we can identify what is driving the instability, whether it is a rotator cuff issue, postural pattern, or direct injury to the tendon's supporting structures, the better the long-term outcome tends to be.
If you're in the Knoxville area and dealing with shoulder pain, popping, or a nagging ache that just won't resolve, we'd love to help you get to the bottom of it. Give us a call at (865) 679-2225 or schedule an appointment online with Dr. Hennie at Homberg Chiropractic & Wellness. You can also learn more on our Shoulder Pain Treatment page.
Medical Disclaimer: This blog post is for educational purposes only and does not replace an in-person evaluation, diagnosis, or treatment plan from a licensed healthcare professional. If you have severe, worsening, or urgent symptoms, seek appropriate medical care.