When people think about arthritis, the knee often gets most of the attention.
But the hip is another important joint commonly affected by osteoarthritis.
Hip osteoarthritis can significantly affect:
- walking
- standing
- sleep
- stair use
- exercise tolerance
- travel
- everyday independence
Yet hip arthritis is sometimes overlooked, misunderstood, or mistaken for other problems.
Patients may assume:
- “It’s just back pain.”
- “It’s a groin strain.”
- “It must be sciatica.”
- “It’s probably just aging.”
These assumptions can delay useful diagnosis and decision-making.
What Is Hip Osteoarthritis?
Hip osteoarthritis is a joint condition involving structural and biological changes affecting the hip joint.
This may involve:
- cartilage degeneration
- subchondral bone change
- osteophyte formation
- joint stiffness
- movement limitation
- synovial irritation
- functional decline
Like knee osteoarthritis, hip OA is not simply “wear and tear.”
It is a more complex whole-joint condition.
The Osteoarthritis Research Society International (OARSI) recognises osteoarthritis as a biologically and mechanically complex joint condition rather than a simplistic passive degeneration model.
Where Hip Arthritis Pain Is Commonly Felt
Patients often expect pain directly over the hip.
But symptoms may be broader.
Common areas include:
- groin
- front thigh
- outer hip
- buttock
- sometimes the knee
This is where confusion begins.
Because hip arthritis can sometimes present as knee pain.
Why Hip Arthritis Is Sometimes Mistaken For Knee Problems
This surprises many patients.
The nervous system does not always localise pain neatly.
Hip pathology may sometimes contribute to referred pain patterns involving:
- the thigh
- the knee
- broader lower-limb discomfort
This is why focusing only on where pain is felt can be misleading.
Common Symptoms Of Hip Osteoarthritis
Possible symptoms include:
- groin discomfort
- stiffness
- difficulty putting on shoes
- trouble getting into cars
- painful longer walking
- reduced stride length
- turning discomfort
- standing from sitting difficulty
- reduced movement confidence
Pattern matters.
Morning Stiffness And Start-Up Pain
Patients often notice:
“Once I get moving, it feels a bit easier.”
This type of stiffness pattern may occur in osteoarthritis.
But symptom context matters.
Not every stiff hip is osteoarthritis.
Why Walking Changes
Hip arthritis may alter walking patterns.
Common changes:
- limping
- shorter stride
- reduced hip extension
- cautious turning
- slower walking
- reduced endurance
Patients often adapt automatically.
But inefficient movement patterns may worsen fatigue.
Hip Arthritis Is Not Always “Just Aging”
Age increases osteoarthritis likelihood.
But age is not a diagnosis.
Not every painful hip in an older adult is osteoarthritis.
Possible alternatives may include:
- referred lumbar pain
- tendon pathology
- bursitis
- inflammatory arthritis
- stress-related bone conditions
- other structural causes
Diagnostic clarity matters.
Imaging May Help—But Context Matters
X-rays are commonly used in hip osteoarthritis assessment.
They may help identify:
- joint space narrowing
- osteophytes
- structural degenerative changes
MRI may be relevant when broader diagnostic questions exist.
But imaging findings must be interpreted clinically.
The National Institute for Health and Care Excellence (NICE) supports diagnosis grounded in clinical assessment rather than simplistic imaging interpretation alone.
Common Misunderstandings
“Hip arthritis always causes side hip pain.”
No.
Groin pain is often more typical.
“If my knee hurts, the problem must be in the knee.”
Not necessarily.
Hip pathology may sometimes refer pain.
“Hip stiffness means severe arthritis.”
Not automatically.
“Aging explains everything.”
No.
Age increases probability but does not confirm diagnosis.
What This Means For Patients
Useful practical questions include:
- Is the pain actually in the groin?
- Does getting into cars hurt?
- Is turning difficult?
- Has my stride shortened?
- Could pain be referred?
- Does the diagnosis actually fit?
The better question is:
“Is the hip the real source of the problem?”
Practical Decision-Making Considerations
Considerations may include:
- pain location
- movement limitation
- walking tolerance
- stiffness pattern
- turning symptoms
- referred pain suspicion
- imaging context
- diagnosis confidence
- broader differential diagnosis
Based on over 20 years of clinical practice, Dr Terence Tan, founder of The Pain Relief Clinic Singapore, notes that hip osteoarthritis is sometimes overlooked because patients focus on where pain is felt, rather than whether the true source of symptoms may be elsewhere.
When Further Assessment May Matter
Further review may be particularly important when:
- groin pain develops
- walking deteriorates
- turning becomes difficult
- knee treatment repeatedly fails
- symptoms behave atypically
- diagnosis remains uncertain
- pain seems referred
Frequently Asked Questions
Can hip arthritis cause knee pain?
Yes.
Referred pain can occur.
Where is hip arthritis pain usually felt?
Often the groin, but other patterns occur.
Is side hip pain always arthritis?
No.
Other diagnoses may exist.
Does hip stiffness mean severe OA?
Not automatically.
Can imaging confirm the diagnosis?
Imaging helps, but clinical interpretation matters.
Is hip arthritis common?
Yes.
It is a recognised cause of lower-limb functional limitation.
Can hip arthritis be mistaken for back pain?
Yes.
Symptom overlap exists.
About the contributor
Dr Terence Tan is a Singapore licensed medical doctor with over 20 years of clinical practice and founder of The Pain Relief Clinic Singapore (https://painrelief.com.sg).
Medical Disclaimer
This article is for educational purposes only and does not constitute personalised medical advice, diagnosis, or treatment recommendations. Individual medical decisions should be made in consultation with an appropriately licensed healthcare professional.
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