A hip replacement can work well for many years, so new pain, clicking, instability, or trouble walking can be unsettling. Patients often wonder whether the implant is failing and whether another operation is inevitable.
The reassuring answer is that pain after hip replacement does not automatically mean the implant has failed. The cause may be the joint replacement, but it may also come from a tendon, muscle, bursa, spine, nerve, hernia, or another medical problem. Even when an implant-related problem is found, revision surgery is not always the first or only treatment.
The important step is a structured evaluation. Symptoms, examination, old and new X-rays, laboratory tests, and selected advanced imaging help answer three different questions:
- What is causing the symptoms?
- Is the implant stable and safe to observe?
- Would revision surgery predictably address the problem well enough to justify its added risks?
What does “hip replacement failure” mean?
A total hip replacement has several parts: a cup fixed in the pelvis, a liner inside the cup, a ball that moves within the liner, and a stem fixed in the thighbone. “Failure” is a broad term for a mechanical, biological, or infectious problem that prevents the replacement from functioning safely or comfortably.
Common reasons for revision total hip replacement include loosening, wear, repeated dislocation, infection, and fracture around the implant. The American Association of Hip and Knee Surgeons explains that bone loss may accompany loosening, wear, or infection and can require larger implants, bone graft, or additional fixation during revision. AAHKS: Revision Total Hip Arthroplasty
A revision can involve changing one part, several parts, or the entire replacement. It is not simply a repeat of the first operation.
Which symptoms deserve an evaluation?
Symptoms vary with the cause. Contact an orthopedic clinician if a replaced hip develops a meaningful change such as:
- New or progressively worsening groin, thigh, buttock, or side-of-hip pain
- Pain with the first few steps after standing, or pain that increases with weight bearing
- New clicking, grinding, clunking, or squeaking accompanied by pain or loss of function
- A sense that the hip slips, gives way, or will not support the leg
- Repeated dislocation or a new fear of certain positions because the hip feels unstable
- A new limp, reduced walking distance, or increasing need for a cane or walker
- Swelling, warmth, redness, wound drainage, or fever
- A change in leg length or the feeling that the leg is rotating differently
- New weakness when lifting the leg or keeping the pelvis level while walking
- Pain after a fall, collision, or sudden twist
The pattern and timing matter. Pain that never settled after the original operation raises different questions from pain that begins after many comfortable years. Pain only on the outside of the hip may reflect a tendon or bursa problem, while groin pain with weight bearing can raise concern about the cup, stem, iliopsoas tendon, or another source. These patterns are clues, not diagnoses.
What can cause a hip replacement to fail?
Loosening, wear, and bone loss
An implant may lose fixation to the surrounding bone. A bearing surface can also wear over time. Microscopic wear particles may trigger an inflammatory response that removes bone around the components, a process called osteolysis.
Some people notice increasing pain with standing or walking. Others have little pain even though serial X-rays show progressive bone loss. This is one reason periodic follow-up may matter: treating a problem before severe bone loss develops can sometimes make reconstruction less complex.
Instability or dislocation
Dislocation occurs when the ball comes out of the socket. It can happen soon after surgery or years later. Contributing factors may include component position, changes in spinal or pelvic motion, muscle weakness, soft-tissue damage, trauma, wear, or impingement.
One dislocation does not always require revision. A clinician may first reduce the hip, assess why it happened, review component position, and consider precautions or a brace. Repeated dislocations, a component that is clearly malpositioned, or instability that cannot be controlled without surgery may lead to revision.
Infection
A joint replacement infection can appear soon after surgery or years later. Symptoms can be dramatic, with fever, redness, drainage, and rapidly increasing pain, but a low-grade infection may present mainly as persistent pain or loosening.
The AAOS guideline supports serum inflammatory markers such as erythrocyte sedimentation rate (ESR) and C-reactive protein (CRP) when evaluating possible periprosthetic joint infection. Synovial fluid tests obtained by joint aspiration can add important information when infection remains a concern. No single result should be interpreted in isolation. AAOS Clinical Practice Guideline: Diagnosis and Prevention of Periprosthetic Joint Infection
Fracture around the implant
A fall or other injury can break the femur or pelvis near a hip replacement. Treatment depends on the fracture pattern, bone quality, and whether the components remain securely fixed. A stable stem may allow fracture fixation while keeping the implant. A loose stem may need revision along with fracture repair.
Corrosion or a reaction to implant debris
Selected implant designs and bearing surfaces can produce metal debris or corrosion products. Local tissue reactions may cause groin pain, swelling, weakness, noise, or difficulty walking. The FDA advises patients with metal-on-metal implants to report new or worsening hip or groin symptoms and notes that a metal ion level by itself does not determine whether revision is needed. FDA: Metal-on-Metal Hip Implants, Information for Patients
Most current hip replacements are not traditional metal-on-metal bearings. Patients should not assume they have one based on how an X-ray looks. Operative records and implant labels are more reliable.
Problems that may not require implant revision
Pain near a replaced hip can come from abductor tendon injury, trochanteric bursitis, iliopsoas irritation, muscle weakness, a pinched spinal nerve, sacroiliac disease, knee arthritis, hernia, or a circulation problem. Persistent pain can also occur without an identifiable mechanical failure.
Finding the true pain generator is essential because changing a well-fixed implant will not reliably solve pain coming from somewhere else.
Is pain normal after hip replacement?
Some discomfort, swelling, weakness, and fatigue are expected early in recovery. The trend should generally move toward better function, even if progress is uneven. A new problem deserves attention when pain is intensifying rather than settling, function is declining, the wound changes, or symptoms return after a comfortable period.
There is no universal date after which every ache is abnormal. The operation performed, recovery course, bone quality, activity, and other health conditions all affect healing. What matters most is the direction of change and whether the symptoms fit the expected recovery plan.
How is a painful hip replacement evaluated?
Step 1: History and records
The clinician will ask when the original replacement was performed, whether there were prior operations, how symptoms began, where the pain is felt, and which activities trigger it. Fever, recent infection, dental or skin problems, falls, dislocations, medication use, and other joint or spine symptoms are relevant.
Bring prior operative reports, implant information, culture results, and old images when available. Comparing studies over time can reveal gradual movement or bone loss that a single X-ray cannot show.
Step 2: Physical examination
The examination may assess gait, leg length, hip motion, strength, tenderness, nerves, circulation, the spine, and nearby joints. Specific maneuvers can help distinguish groin pain from lateral tendon pain or pain referred from the back.
Step 3: X-rays
Plain radiographs are usually the starting point. They can show component position, fracture, dislocation, wear, migration, changes around the bone-implant interface, and areas of bone loss.
The American College of Radiology rates hip radiographs as usually appropriate for symptomatic patients with a hip prosthesis. Additional imaging is selected after the radiographs based on the suspected problem. ACR Appropriateness Criteria: Imaging After Total Hip Arthroplasty
Step 4: Laboratory tests and aspiration when infection is possible
Blood tests such as ESR and CRP can help estimate whether infection is likely, but normal tests do not answer every case. If concern remains, image-guided aspiration can obtain joint fluid for cell counts, biomarkers, and cultures.
Unless a patient is acutely ill and needs immediate treatment, antibiotics are often avoided before diagnostic cultures because they can make the organism harder to identify. That decision belongs to the treating medical team.
Step 5: Targeted advanced testing
Not every patient needs every test. Depending on the question, the plan may include:
- CT to define component position, bone loss, or a fracture
- MRI using metal-artifact-reduction techniques to assess muscles, tendons, fluid collections, or adverse tissue reactions
- Ultrasound to evaluate selected soft tissues or guide aspiration
- Nuclear medicine imaging in selected difficult cases
- Metal ion testing when the implant type and clinical findings make corrosion or metal debris a realistic concern
The best test is the one that resolves a specific uncertainty and can change treatment.
When is revision hip replacement recommended?
Revision is considered when there is a defined implant-related problem that is causing unacceptable pain, loss of function, instability, progressive damage, infection, or danger to the surrounding bone and tissues.
Examples include:
- A loose cup or stem associated with pain, migration, or progressive bone loss
- Recurrent dislocation caused by a correctable mechanical or soft-tissue problem
- A deep infection that requires surgical treatment
- A fracture with a loose implant or a pattern that cannot be stabilized adequately without revision
- Advanced liner wear, broken components, or progressive osteolysis
- Component malposition that causes instability, impingement, or damaging wear
- A clinically important adverse tissue reaction related to corrosion or implant debris
Revision may also be discussed before pain becomes severe when imaging shows progressive bone destruction or an implant at risk of a more damaging failure. The goal is not to operate on an X-ray alone. It is to prevent avoidable harm when observation is no longer the safer choice.
When might surgery not be the next step?
Observation can be reasonable when the components are stable, symptoms are manageable, and imaging does not show a progressive threat. Follow-up may include repeat examination and comparison X-rays at an interval chosen for the specific finding.
Nonsurgical care may help when symptoms come from muscle weakness, a tendon, a bursa, the spine, or another condition outside the implant. Treatment can include activity adjustment, medication when medically appropriate, a walking aid, and targeted rehabilitation. An injection should not be used as a shortcut before infection and implant problems have been thoughtfully considered.
Revision is also unlikely to help when the pain source remains uncertain. In that situation, a careful second opinion and further diagnostic work may be more useful than rushing into surgery.
What happens during revision hip surgery?
The operation is tailored to the problem. A surgeon may exchange only the ball and liner, revise the cup, revise the stem, or replace all components. Treating bone loss may require specialized revision implants, screws, augments, or bone graft. A fracture may need plates, cables, or other fixation.
Infection can require removal of components, thorough cleaning, antibiotics, and either a new implant during the same operation or a staged reconstruction. The best approach depends on the organism, duration of infection, soft tissues, bone, implant stability, and patient health.
Because old components may be firmly fixed and bone may be deficient, revision surgery generally takes longer and is more complex than a first hip replacement. A planned cut in the femur is sometimes needed to remove a stem safely, and weight bearing may be restricted while the bone heals.
What are the risks and recovery demands?
Important risks include:
- Infection
- Dislocation or recurrent instability
- Fracture or further bone loss
- Blood clots in the leg or lungs
- Nerve or blood-vessel injury
- Bleeding or transfusion
- Leg-length difference, weakness, or limp
- Persistent pain or stiffness
- Failure of the new components to fix or function as intended
- Need for another operation
- Medical complications involving the heart, lungs, kidneys, or other systems
Recovery depends on what was revised and why. Some patients can bear weight quickly, while others need a walker or crutches and limited weight bearing for weeks or longer. Physical therapy, home support, transportation, wound care, and fall prevention should be planned before surgery. AAHKS notes that revision recovery can be longer than primary replacement recovery, particularly when extensive exposure, bone grafting, or protected weight bearing is required.
Revision can improve pain, stability, and function when it addresses the correct problem, but it cannot promise a normal hip or erase every source of pain.
Questions to ask at a revision consultation
Bring a written list and ask:
- What is the most likely cause of my symptoms?
- What findings prove that the implant is loose, infected, unstable, worn, or damaged?
- Could the pain be coming from my spine, tendons, muscles, or another source?
- Which tests are still needed, and how would each result change the plan?
- Is observation safe, and what change would make surgery more urgent?
- Which components would you expect to revise?
- Is there bone loss, and how would it be reconstructed?
- What are my personal risks for infection, fracture, dislocation, blood loss, or nerve injury?
- Will I have weight-bearing restrictions, and what help will I need at home?
- What result is realistic for pain, walking, work, and preferred activities?
When symptoms are an emergency
Go to an emergency department after a fall or sudden movement if the hip appears out of place, the leg looks shortened or rotated, pain is severe, or you cannot stand. Do not try to force a dislocated hip back into place.
Urgent evaluation is also needed for a new wound opening, pus-like drainage, rapidly spreading redness, fever with a hot and worsening joint, or a sudden crack followed by inability to bear weight. Call emergency services for chest pain, shortness of breath, fainting, or a cold, pale, numb, or weak leg.
Revision hip replacement evaluation in Hawai‘i
Revision planning may require prior operative records, specialized imaging, aspiration, medical optimization, and coordination around island travel or help at home. Starting that work before symptoms become disabling can reduce delays and make the options clearer.
Pacific Bone & Joint provides revision hip and knee replacement evaluation in Hawai‘i. The goal is to identify whether the implant is actually the problem, explain what the tests show, and compare observation, nonsurgical care, and revision on the basis of risk and likely benefit.
If a replaced hip has new pain, instability, a recent injury, or an abnormal X-ray, request a revision hip evaluation with Pacific Bone & Joint. Bring any old images, operative notes, and implant records you can obtain.
The bottom line
Hip replacement failure can result from loosening, wear, bone loss, instability, infection, fracture, component position, or a reaction to implant debris. Similar symptoms can also come from tissues outside the replacement.
Revision surgery is most helpful when a careful evaluation identifies a correctable implant-related problem and the expected benefit outweighs the added complexity and risk. New pain should be investigated, but it should not be treated as proof that another operation is inevitable.
Sources and further reading
- American Association of Hip and Knee Surgeons: Revision Total Hip Arthroplasty
- American College of Radiology: Imaging After Total Hip Arthroplasty
- American Academy of Orthopaedic Surgeons: Diagnosis and Prevention of Periprosthetic Joint Infection
- U.S. Food and Drug Administration: Metal-on-Metal Hip Implants, Information for Patients
This article is for general education and does not replace individualized medical advice. Treatment recommendations should be confirmed with a qualified clinician who has evaluated you.
