Hip Replacement Surgery Risks and Complications: A Surgeon's Honest Guide

If your surgeon has advised a hip replacement, one question probably sits at the top of your mind: what could go wrong? It is a sensible question, and you deserve a straight answer rather than either a sales pitch or a scare story.

The honest picture is this. Total hip replacement is one of the most successful operations in modern medicine, and the large majority of patients get excellent pain relief and mobility. But it is still major surgery, and every major surgery carries risks. This guide explains each risk and complication in plain language, when it tends to happen, how common it is, what the warning signs look like, and, most importantly, what you and your surgical team can do to lower the odds.

Quick Answer: What Are the Risks of Hip Replacement Surgery?

The main risks and complications of hip replacement surgery are infection, blood clots (deep vein thrombosis and pulmonary embolism), dislocation of the new joint, leg length difference, nerve injury, fracture of the bone, implant loosening or wear over time, and general medical problems such as heart, lung or kidney complications. Most are uncommon, many are preventable, and serious problems affect only a small minority of patients when surgery is planned and performed well.

Key Takeaways

• Most hip replacement patients do well. Serious complications are the exception, not the rule.
• Your own health before surgery (blood sugar, anemia, weight, smoking, dental and skin health) strongly influences your risk.
• Good technique, antibiotic and clot-prevention protocols and early walking reduce the biggest dangers.
• Knowing the warning signs lets you act early, which makes most complications far easier to treat.

How Safe Is Hip Replacement Surgery?

Hip replacement has been refined for decades. Better implants, cleaner operating theatres, improved anesthesia, blood-saving drugs and structured rehabilitation have all pushed complication rates down. Published guidance notes that thorough pre-operative preparation makes serious or catastrophic problems extremely rare, and many modern implants are expected to last 20 to 25 years or more.

That said, "safe" is not the same as "risk free". Studies also show that complications such as infection and blood clots are largely preventable when antibiotic and clot-prevention guidelines are followed closely. In other words, the quality of the surgical team, the hospital protocols and your own preparation all matter.

It also helps to remember the other side of the ledger. Untreated advanced hip arthritis has its own risks: long-term pain, muscle wasting, falls, loss of independence and a higher chance of other health problems from being unable to stay active. The decision is always a balance between the risks of operating and the risks of waiting.

Hip Replacement Risks and Complications at a Glance

The figures below are general ranges from large published series and vary with patient health, implant, technique and hospital. Your surgeon can give you a personalised estimate.

Complication	When it usually occurs	Approximate frequency	Main ways to reduce it
Infection	Early (weeks) or late (months to years)	Around 1 percent or less	Antibiotic cover, clean theatre, control diabetes, treat dental and skin infections
Blood clots (DVT)	First days to weeks	Low with prevention	Blood thinners, early walking, calf exercises
Pulmonary embolism	First weeks	About 1 in 100 for symptomatic cases in one large series; fatal cases far rarer	Same as above
Dislocation	Mostly first 3 months	Roughly 1 to 3 percent	Correct implant position, follow movement precautions
Leg length difference	Immediately after surgery	Common to a small degree	Careful planning and measurement
Fracture of the bone	During surgery or later	Small crack at surgery in about 1 to 2 percent of cementless stems in one report	Good bone assessment, correct implant choice
Nerve injury	During surgery	Uncommon	Careful technique, safe positioning
Implant loosening or wear	Years later	Small; most implants last 20 years or more	Quality implants, healthy weight, avoiding repeated heavy impact
Medical complications (heart, lung, kidney, delirium)	First days	Higher in frail or older patients	Pre-surgery health optimisation

Risks During Surgery

These are the problems that can arise in the operating theatre itself. They are uncommon and surgical teams are trained to prevent and manage them.

Anesthesia-related risks

Whether you have spinal (regional) or general anesthesia, there are small risks, including low blood pressure, nausea, breathing or heart rhythm changes and, rarely, allergic reactions. A pre-anesthesia check of your heart, lungs, medicines and allergies is what keeps these risks low. Spinal anesthesia is often preferred because it can lower the chance of some lung and clot problems and speeds early recovery.

Bleeding and blood transfusion

Hip replacement involves some blood loss. Modern practice uses tranexamic acid and careful surgical technique, which has dramatically reduced the need for transfusions. If you already have anemia before surgery, the chance of needing blood rises, which is why we correct low hemoglobin beforehand.

Fracture during surgery

To seat the implant firmly, the surgeon has to prepare and press fit it into the bone. In a small number of cases, particularly with fragile or osteoporotic bone, a thin crack can occur. When recognised, it is usually secured with a cable or wire during the same operation, and you may need a longer period on crutches or a walker to let the bone heal.

Nerve and blood vessel injury

The sciatic nerve runs close to the hip. If it is stretched or bruised, it can cause numbness, weakness or difficulty lifting the foot (foot drop). Serious injury is rare, and many mild nerve problems improve over weeks to months. Injury to a major blood vessel is extremely rare.

Early Complications (First Days to 3 Months)

Infection of the joint (periprosthetic joint infection)

Infection is the complication patients fear most, and with good reason. If bacteria settle on the implant, they can form a protective film that antibiotics alone struggle to clear. Early infection may appear as increasing pain, redness, warmth, swelling, wound drainage or fever. Prevention is the best strategy:

• Antibiotics given before the incision and for a short period afterwards
• A properly controlled operating environment and strict sterile technique
• Well-controlled blood sugar if you have diabetes
• Treating tooth, urine, skin or foot infections before your surgery date

If an infection does occur, early washout of the joint with implant retention may succeed. Deeper or later infections can need staged revision surgery.

Blood clots: DVT and pulmonary embolism

After major hip surgery, blood flow slows and the clotting system becomes more active, so clots can form in the leg veins (deep vein thrombosis, or DVT). A piece of clot can travel to the lungs (pulmonary embolism), which is the most dangerous early complication. In one large 10-year study of over 26,000 hip replacements, symptomatic pulmonary embolism occurred in roughly 1 percent of patients and fatal cases in about 0.02 percent, which shows both that the risk is real and that it is very rare to die from it.

Prevention includes blood-thinning medicine, compression stockings or pumps, calf and ankle exercises and, crucially, getting up and walking early, often on the day of surgery. See our guide to total hip replacement recovery time in India for how soon you should expect to be moving.

Dislocation

The new ball can slip out of the socket, most often in the first few months while the soft tissues are still healing. It causes sudden severe pain, a deformed or shortened leg and inability to walk. Risk is lowered by correct implant positioning, larger femoral heads where appropriate, soft tissue repair and following your movement precautions. A first dislocation is usually treated by gently putting the joint back and a brace or period of restricted movement, though repeated dislocations may need surgery.

Leg length difference

The operated leg can feel slightly longer or shorter. A small difference is common and may be partly because the hip had shortened due to arthritis. Surgeons plan carefully to restore balance, and a small shoe lift can help if needed. A large difference is uncommon and should be discussed with your surgeon.

Wound problems and hematoma

Delayed wound healing, persistent drainage or a collection of blood (hematoma) can occur, especially in people who are overweight, diabetic or on blood thinners. Early wound review is the best protection, because a wound that is leaking after about 5 to 7 days needs attention.

Medical complications

Heart rhythm problems, chest or urinary infections, kidney strain, constipation, urinary retention and, in older adults, post-operative confusion (delirium) can all occur. These are why a thorough health check, medicine review and early mobilisation matter so much in elderly patients and those with other illnesses.

Persistent pain, stiffness and heterotopic ossification

Some patients have stubborn thigh or groin pain, or a stiff hip. Occasionally, extra bone forms in the soft tissues around the joint (heterotopic ossification), which can limit movement. Most cases improve with physiotherapy, and only a few need further treatment.

Late Complications (Months to Years After Surgery)

Implant wear and loosening

Every bearing surface wears slightly over time. Wear particles can irritate the surrounding bone (osteolysis) and eventually cause the implant to loosen. This presents as new, gradual pain, often with activity or when you first put weight on the leg. Modern bearings made of highly cross-linked polyethylene and ceramic wear much less than older designs.

Late infection

Bacteria from elsewhere in the body, such as a dental abscess, skin infection or urinary infection, can occasionally travel through the bloodstream and settle on the implant years later. Prompt treatment of infections elsewhere, and telling every doctor and dentist that you have a joint implant, helps protect you.

Fracture around the implant

A fall, especially in older people with weak bones, can fracture the bone around the stem. These injuries often need surgery. Bone health checks, fall prevention at home and vitamin D and calcium optimisation are sensible protections.

Metal-related concerns

Older metal-on-metal bearings were linked to metal ion release and soft tissue reactions, and they have largely fallen out of routine use. If you have an older metal-on-metal implant, follow-up checks are important. For the newer options, see our comparison of hip resurfacing vs total hip replacement.

Who Is at Higher Risk of Complications?

Risk is not the same for everyone. Factors that raise it include:

• Poorly controlled diabetes, which affects infection and wound healing
• Obesity, which strains the wound, the joint and the heart. Our article on how obesity affects joint health explains why
• Anemia, which increases the need for transfusion and can slow recovery
• Smoking or tobacco chewing, which impairs bone and wound healing
• Osteoporosis or weak bone, which raises fracture risk
• Long-term steroid use or inflammatory arthritis such as rheumatoid arthritis
• Heart, lung or kidney disease
• Previous hip surgery or hip fracture
• Active infections in teeth, skin, urine or feet
• Advanced age or frailty, although age alone is not a reason to refuse surgery

The encouraging part is that many of these factors can be improved before surgery. Postponing an operation for a few weeks to optimise your health is often one of the best things you can do for a good result.

Does the Surgical Approach Change the Risk?

Surgeons use different routes to reach the hip, including posterior, lateral and anterior approaches. Each has trade-offs. The anterior approach spares more muscle and may allow quicker early recovery and a lower dislocation tendency in some series, while other approaches give excellent access in complex cases and have their own strong track records. No approach is risk free, and the surgeon's experience with the chosen technique matters more than the label. Our detailed guide to the anterior approach hip replacement in India explains who benefits most.

How to Lower Your Risk: Before, During and After Surgery

Before surgery

• Get your numbers right. Blood sugar, hemoglobin, kidney function and blood pressure should be in a safe range.
• Treat hidden infections. See your dentist, and sort out any skin, foot or urinary problems first.
• Stop smoking and tobacco. Even a few weeks helps.
• Lose excess weight where possible, and strengthen your legs with pre-habilitation exercises.
• Review your medicines with your surgeon and physician, especially blood thinners, diabetes medicines and supplements.
• Prepare your home. Remove loose rugs, add a raised toilet seat or commode, and plan for seating at the right height, because low seats and floor-level toilets are a common challenge in Indian homes.

During surgery

Ask about antibiotic protocols, clot-prevention plans, implant choice, imaging and planning for leg length, and the hospital's infection control record. Surgeon experience and a well-run team reduce complications.

After surgery

• Walk early and often as advised.
• Follow your hip precautions for the period your surgeon recommends.
• Take blood thinners exactly as prescribed.
• Keep the wound clean and dry, and do not apply home remedies or powders.
• Do your physiotherapy. Our home physiotherapy plan after hip replacement walks you through safe exercises week by week.
• Prevent falls. Be extra careful on wet floors during the monsoon, on stairs and in bathrooms.
• Attend every follow-up, including long-term X-rays.

Warning Signs: When to Call Your Surgeon or Go to Emergency

Warning sign	What it may mean	Action
Sudden chest pain, breathlessness, coughing blood	Pulmonary embolism	Emergency care immediately
Calf swelling, warmth, tenderness, redness in one leg	DVT	Same-day medical review
Fever, chills, increasing wound redness, pus or drainage	Infection	Call your surgeon the same day
Sudden severe hip pain, leg shortened or turned, cannot bear weight	Dislocation or fracture	Emergency care
New numbness or weakness, foot dragging	Nerve problem	Contact your surgeon promptly
Pain returning months or years later, limp, start-up pain	Loosening, wear or late infection	Book a review with X-rays

Do not wait to see if these settle on their own. Early treatment is almost always simpler and more successful.

How Are Complications Treated? Understanding Revision Surgery

Most problems are managed without another operation, using medicines, bracing, physiotherapy or a short procedure such as washing out the joint. When an implant is loose, worn, infected beyond early salvage or repeatedly dislocating, revision hip replacement may be advised. This is a more complex operation than the first one and works best in the hands of a high-volume joint surgeon, but it can restore function and relieve pain in most patients.

Is the Risk Worth It? Weighing Surgery Against Alternatives

Surgery is not the right answer for every painful hip. In earlier stages of arthritis, structured exercise, weight management, medicines and image-guided injections can delay or sometimes avoid replacement. Read our evidence-based guide to non-surgical alternatives to hip replacement and our explanation of regenerative treatment for hip arthritis, which sets out honestly what these options can and cannot do.

On the other hand, if you have severe pain at night, a shrinking walking distance, difficulty with stairs and daily tasks, and non-surgical care has stopped working, the risks of waiting can outweigh the risks of surgery. Not sure what is causing your symptoms? Start with our guide to hip pain care in Bengaluru, or read about hip pain when standing from a chair, a common early clue.

Costs, Insurance and Complications

Complications can add to the cost through longer stays, extra medicines or further procedures. Choosing the right hospital, implant and surgeon, and understanding what is included in the package, helps you avoid surprises. Our hip replacement cost in Bangalore page and our detailed article on hip replacement surgery cost in India give realistic ranges, and our insurance and cashless treatment guide explains what your policy may cover.

Questions to Ask Your Surgeon Before Hip Replacement

• How many hip replacements do you perform each year?
• Which approach and implant do you recommend for me, and why?
• What are my personal risks, given my diabetes, weight or other conditions?
• What is your infection and clot-prevention protocol?
• What movement precautions will I have, and for how long?
• What happens if a complication occurs, and who will I contact after hours?

A surgeon who welcomes these questions is a good sign. For more help choosing, see our guide to the best orthopedic surgeon in Attibele.

Hip Replacement Care with Dr. Nitin N Sunku in Bengaluru

Dr. Nitin N Sunku is a fellowship-trained orthopedic and sports medicine surgeon with an MS in Orthopedics (gold medalist), who consults in Attibele and HSR Layout. His approach is conservative first: surgery is recommended only when the benefits clearly outweigh the risks, and every plan starts with a careful examination, honest risk discussion and health optimisation.

Learn more about our hip replacement surgery service, explore joint replacement care in Attibele, or visit our HSR Layout consultation clinic.

Frequently Asked Questions About Hip Replacement Risks and Complications

What are the most common complications of hip replacement surgery?
The most common are blood clots, a small leg length difference, stiffness or temporary thigh pain, and, less often, infection and dislocation. Most are preventable or treatable when recognised early.

How risky is hip replacement surgery?
For most healthy patients it is a low-risk, high-reward operation. Risk rises with age, other illnesses, anemia, diabetes and obesity, but good preparation lowers it significantly.

What is the most serious complication after hip replacement?
Pulmonary embolism (a clot reaching the lungs) and deep implant infection are the most serious. Both are uncommon and are actively prevented with blood thinners, early walking and antibiotic protocols.

How common is dislocation after hip replacement?
Dislocation affects a small minority of patients, roughly 1 to 3 percent in many series, mostly in the first three months. Following your precautions and good implant positioning reduce the risk.

Can a hip replacement fail?
Yes, though it is uncommon. Reasons include infection, loosening, wear, dislocation or fracture. Many implants last 20 to 25 years or longer, and a failed implant can often be revised.

How long do I have to watch for complications?
The highest-risk window is the first 6 to 12 weeks, but some problems, such as loosening or late infection, can appear years later, which is why long-term follow-up matters.

Does hip replacement cause leg length problems?
A small difference is common and often not noticeable once you adapt. Surgeons plan to match leg lengths, and a shoe lift can help if a difference bothers you.

Is hip replacement safe for people over 70 or 80?
Often yes. Age alone is not a barrier. What matters is overall health, bone quality and mobility, plus a careful anesthesia and medical assessment.

Can I reduce my risk of infection after hip replacement?
Yes. Control blood sugar, stop smoking, treat dental and skin infections beforehand, keep the wound clean and dry, finish prescribed antibiotics, and report fever or wound changes immediately.

When can I return to normal activities?
Most people walk the same day or next day, drive after several weeks, and feel substantially recovered by 3 months, with continued improvement up to a year. Your surgeon will tailor this to you.

Which doctor should I see for hip replacement in Bengaluru?
Choose a fellowship-trained orthopedic surgeon with regular joint replacement experience and a clear complication-prevention plan. Dr. Nitin N Sunku consults in Attibele and HSR Layout.

Final Thoughts

Hip replacement surgery risks and complications are real, but they are also well understood and, in most cases, preventable or treatable. The patients who do best are those who get their health in order beforehand, choose an experienced surgical team, follow rehabilitation faithfully and speak up early if something feels wrong.

If you are weighing hip replacement and want a frank, personalised discussion of your own risks, bring your X-rays and reports to a consultation. You can book an appointment with Dr. Nitin N Sunku or call +91-9980031006.

References

• Hip replacement surgery overview and risks — Johns Hopkins Medicine
• Prevention of early complications following total hip replacement — SICOT-J (PMC)
• Non-compliance with clinical guidelines increases complications after hip and knee replacement (PMC)

Medical disclaimer: This article is for general education and does not replace personal medical advice. Risk figures are approximate and vary between patients and hospitals. Please consult a qualified orthopedic surgeon about your own situation.