Frozen Shoulder vs Rotator Cuff Injury: What’s Actually Causing Your Shoulder Pain?
If shoulder pain has been building for weeks, or you woke up one morning unable to lift your arm above
your head, it’s natural to start searching for answers. Two of the most common culprits, frozen shoulder
and a rotator cuff injury, get confused with each other constantly, partly because both can cause pain,
stiffness and disturbed sleep. At our clinics in Duston and Kislingbury, this is one of the questions our
Northampton patients ask us most often. Here’s how to tell the two apart, and what to do next.
What Is Frozen Shoulder?
Frozen shoulder, also known as adhesive capsulitis, happens when the capsule surrounding the shoulder
joint thickens and tightens, gradually restricting movement in every direction. It’s one of the more
misunderstood shoulder conditions, partly because it develops slowly and partly because, unlike an
injury, there’s often no clear trigger.
It’s more common than most people realise. Cambridge University Hospitals NHS Foundation Trust puts
the prevalence at around 2 to 5 percent of the general population, most commonly between the ages of
40 and 70. Research behind the UK FROST trial, the largest study of its kind into frozen shoulder
treatment, found it affects roughly 1 in 12 men and 1 in 10 women of working age. Leeds Community
Healthcare NHS Trust also notes that around 70 percent of frozen shoulder cases occur in women, and
that people with diabetes are significantly more likely to develop it.
Frozen shoulder tends to move through three stages: a painful “freezing” stage, a stiff “frozen” stage
where movement is most limited, and a gradual “thawing” stage as range of motion returns. The full
course can take anywhere from one to three years, which is often the most frustrating part for patients.
What Is a Rotator Cuff Injury?
The rotator cuff is a group of four muscles and tendons that hold the top of your arm bone in the
shoulder socket and control rotation and lifting. A rotator cuff injury can range from mild tendinopathy
(irritation of the tendon) through to a partial tear or a full-thickness tear, and it can happen gradually
through wear and tear or suddenly after a fall or a heavy lift.
This is also far more common than many people expect. A widely cited review found rotator cuff disease
affects between 6.8 and 22.4 percent of adults over 40, rising sharply with age. A UK-based study of the
Chingford cohort, published in BMJ Open, scanned a representative group of UK women aged 64 to 87
and found a full-thickness tear prevalence of 22.2 percent, increasing further with age. Interestingly,
almost half of the full-thickness tears found (48.4 percent) caused no symptoms at all, which is why
some people are surprised to learn they have one only when a scan is done for another reason.
Unlike frozen shoulder, a rotator cuff injury usually causes pain or weakness with specific movements,
such as reaching overhead, reaching behind your back, or lifting away from your body, rather than
stiffness in every direction.
How to Tell Them Apart
- Frozen shoulder: gradual onset, stiffness restricts movement in all directions, most common
between ages 40 and 70, often no injury trigger. - Rotator cuff injury: pain or weakness tends to show up with specific movements, may follow a
fall or lifting injury, or build gradually with age and overuse. - Both: pain that’s often worse at night, disturbed sleep, and symptoms that can overlap in the
early stages.
Because the two conditions can look similar early on, and because the right approach differs for each,
self-diagnosis from symptoms alone isn’t reliable. A hands-on assessment makes the difference.
How Our Team Assesses Shoulder Pain
Our chiropractors at Duston and Kislingbury assess shoulder pain by taking a full history and testing your
range of movement to identify the pattern behind your symptoms, whether that points toward a
capsular restriction typical of frozen shoulder, or a movement-specific weakness more typical of a
rotator cuff issue. Depending on what we find, care may include manual therapy, soft tissue work, and
guided rehabilitation exercise to support movement and manage pain. Where symptoms suggest a
significant tear or another underlying issue, we will refer you on for imaging or a specialist opinion.
You can read more about our approach on the Shoulder Pain treatment page and our Soft Tissue
Therapy page.
Frequently Asked Questions
What’s the difference between frozen shoulder and a rotator cuff injury?
Frozen shoulder causes stiffness and restricted movement in every direction, while a rotator cuff injury
typically causes pain or weakness with specific movements, such as reaching overhead or behind your
back. The two conditions can feel similar in the early stages, which is why a proper assessment matters.
Can a chiropractor help with frozen shoulder?
Yes. Our team can assess your shoulder, help manage pain and stiffness through manual therapy and
guided exercise, and monitor your progress through the freezing, frozen and thawing stages. If your
symptoms suggest a more complex case, we will refer you for further investigation.
Can a chiropractor help with a rotator cuff injury?
Chiropractic care can support recovery from many rotator cuff injuries, particularly tendinopathy and
partial tears, through manual therapy, soft tissue work and rehabilitation exercise. Suspected full-
thickness tears or cases with significant weakness are referred for imaging or an orthopaedic opinion.
How long does frozen shoulder take to get better?
Frozen shoulder typically resolves within one to three years, though the timeline varies widely between
patients. Symptoms usually move through three phases: a painful freezing stage, a stiff frozen stage, and
a gradual thawing stage as movement returns.
Do I need a scan before seeing a chiropractor about shoulder pain?
No, a scan is not required before your first appointment. Our team will carry out a clinical assessment
first and only recommend imaging such as an ultrasound or MRI if your symptoms suggest it is needed.
Get Your Shoulder Assessed
Shoulder pain that lasts more than a couple of weeks, or that’s stopping you sleeping or working
comfortably, is worth having assessed properly rather than guessed at. Our team at Duston and
Kislingbury will identify what’s actually going on and recommend the right next step, whether that’s
hands-on care with us or a referral for further investigation.
Book an appointment at our Duston or Kislingbury clinic, or contact us if you have any questions first.