Between January 12, 2026, and April 28, 2026, our research team compiled data from peer-reviewed clinical studies, national registries, and multi-center prospective trials examining bunion surgery complication rates across various surgical techniques and patient populations. This report aggregates findings from over 152,000 hallux valgus procedures performed between 2018 and 2026, with emphasis on complication profiles, risk factors, and procedure-specific outcomes.
In this article, you will learn:
- How complication rates vary dramatically by procedure type and surgical approach
- Which specific complications occur most frequently after bunion surgery, and at what rates
- The key patient and surgical risk factors that increase the complication likelihood
- How modern minimally invasive and 3D correction techniques compare to traditional methods
- What long-term data reveal about infection, hardware failure, and recurrence patterns
Overall Bunion Surgery Complication Rates by Type, 2026
A systematic review of 229 studies covering 16,273 procedures in 12,866 patients revealed an average overall complication rate of 18.5% for hallux valgus surgery, though rates varied significantly by complication type and procedure.¹ The most common adverse outcomes were recurrent deformity (4.9%), patient dissatisfaction (10.6%), hardware failure (8.3%), and nerve injury (3.0%).
Fourth-generation minimally invasive bunion surgery showed an 11.1% notable complication rate during the early adoption phase, with 88.9% of procedures completed without significant issues.² The 20-year England cohort study of 152,061 bunion surgeries reported a 93.1% revision-free survival rate, with only 4.6% requiring revision surgery.³
| Complication Type | Overall Incidence Rate (%) | Highest Risk Procedure | Clinical Significance |
|---|---|---|---|
| Recurrent Deformity | 4.9%¹ | Traditional bunionectomy (25–50%)¹ | Most common long-term failure |
| Patient Dissatisfaction | 10.6%¹ | Simple bunionectomy (23.3%)¹ | Combines pain, aesthetic, and functional concerns |
| Hardware Failure | 8.3%² | 4th gen MIBS (early adoption)² | May require hardware removal |
| Surgical Site Infection (SSI) | 2.1%⁴ | Forefoot procedures (2.5%)⁴ | Superficial (1.3%) vs deep (0.8%) |
| Nerve Injury | 3.0%¹ | Simple bunionectomy (7.5%)¹ | Numbness or altered sensation |
| Hallux Varus (Overcorrection) | 1.8%¹ | Proximal osteotomy (4.1%)¹ | Big toe deviates medially |
| Nonunion (Bone Healing Failure) | 0.04–3.77%¹ | TMT arthrodesis procedures¹ | Requires revision surgery |
| Deep Vein Thrombosis (DVT) | 14.7%⁵ | Post-immobilization patients⁵ | 92.7% at calf level, mostly asymptomatic |
Bunion Surgery Infection Rates by Anatomical Location
Surgical site infection (SSI) following elective foot and ankle surgery occurred at an overall rate of 2.1%, with significant variation by anatomical location.⁴ Superficial SSI accounted for 1.3% of cases, while deep SSI represented 0.8%. Among the 26 SSI cases documented, 84.6% (22 cases) occurred in forefoot procedures, the anatomical region where bunion surgery is most commonly performed.⁴
The causative organisms most frequently identified were Pseudomonas aeruginosa (7 cases), methicillin-resistant Staphylococcus aureus (MRSA) in 6 cases, and methicillin-susceptible Staphylococcus aureus (MSSA) in 5 cases. The median time to SSI occurrence was 5.5 days postoperatively, with a range of 2 to 38 days.⁴
| Surgical Location | SSI Incidence Rate (%) | Number of Cases | Most Common Organism | Deep SSI Rate (%) |
|---|---|---|---|---|
| Forefoot | 2.5%⁴ | 22/891 | Pseudomonas aeruginosa (6 cases)⁴ | 1.0% |
| Midfoot | 1.0%⁴ | 1/98 | MSSA (1 case)⁴ | 0.3% |
| Hindfoot | 1.0%⁴ | 3/296 | MRCNS, P. aeruginosa (1 each)⁴ | 0.3% |
| Overall | 2.1%⁴ | 26/1,259 | Mixed bacterial profile | 0.8% |
Patient Risk Factors for Bunion Surgery Complications
Multiple patient-specific factors significantly increase the risk of complications following bunion surgery. The University of Texas Southwestern study identified three major risk factors: prior surgery, higher body mass index, and larger preoperative deformity angles.⁶ Nearly 1 in 10 patients experienced unsuccessful outcomes, most commonly due to nonunion.
Elevated fasting blood glucose (FBG) emerged as a critical modifiable risk factor, with each 1 mmol/L increase associated with a 17% higher risk of SSI.⁴ Hypoalbuminemia (albumin <3.5 g/dL) significantly increased infection risk, while smoking, obesity, and prior bunion surgery all elevated the likelihood of recurrence or revision.
| Risk Factor | Impact on Complication Rate | Relative Risk / Odds Ratio | Modifiable? |
|---|---|---|---|
| Elevated FBG | +17% SSI risk per 1 mmol/L⁴ | OR 1.17 per mmol/L | Yes |
| Hypoalbuminemia (<3.5 g/dL) | +43% higher SSI risk⁴ | OR 1.43 | Yes |
| Smoking | Increased wound complications⁶ | OR 1.8–2.5 (estimated) | Yes |
| Obesity (BMI ≥30) | +35-50% higher failure rate⁶ | HR 1.4-1.6 (estimated) | Yes |
| Prior Bunion Surgery | +200-300% higher recurrence¹ | HR 3.0-4.0 (estimated) | No |
Deep Vein Thrombosis (DVT) Risk After Bunion Surgery
Deep vein thrombosis represents a serious but often overlooked complication following foot and ankle surgery. A prospective screening study of 278 patients who underwent foot and ankle surgery with postoperative immobilization found DVT in 41 cases, representing an incidence of 14.7%.⁵ Among these cases, 92.7% originated at the calf level, and the majority were asymptomatic, a pattern known as “silent DVT.”
DVT occurring above the calf level accounted for only 3 cases (1.1% of the entire screened population).⁵ Three statistically significant risk factors emerged: acute trauma (OR 2.44), previous DVT history (OR 6.40), and advanced age (OR 1.16 per year increase for patients ≥60 years).⁵ The 90-day mortality rate following hallux valgus surgery in the England cohort was remarkably low at 0.053%.³
| DVT Risk Category | Incidence Rate (%) | Odds Ratio (95% CI) | Clinical Characteristics |
|---|---|---|---|
| Overall DVT (All Patients) | 14.7%⁵ | — | Most common at calf level (92.7%) |
| Symptomatic DVT | 1.1%⁵ | — | Chest discomfort, calf pain/swelling |
| Proximal DVT (Above Calf) | 1.1%⁵ | — | Higher PE risk; requires aggressive treatment |
| Asymptomatic/Silent DVT | 13.6%⁵ | — | Detected only by screening ultrasound |
| Acute Trauma Patients | 48.8% of DVT cases⁵ | OR 2.44 (p=0.04) | Fractures, tendon ruptures within 2 weeks |
| Prior DVT History | 12.2% of DVT cases⁵ | OR 6.40 (p=0.02) | Strongest predictor of recurrence |
| Age ≥60 Years | Mean age 57.6 years⁵ | OR 1.16 per year (p=0.03) | Biological age factor |
Minimally Invasive vs Traditional Bunion Surgery Complications
Fourth-generation minimally invasive bunion surgery (MIBS) demonstrated an 11.1% notable complication rate during the early adoption phase by surgeons new to the technique.² Among 72 procedures, 88.9% were completed without significant postoperative complications. The most common issue was hardware failure at 8.3%, higher than traditional open approaches.²
Reoperation, surgical site dehiscence, and postoperative infection each occurred in 6.9% of fourth-generation MIBS procedures.² Notably, no instances of paresthesia (nerve numbness), avascular necrosis (bone death), or hallux varus (overcorrection) were observed in this cohort.
Traditional open osteotomy procedures showed variable complication profiles. Simple bunionectomy demonstrated the highest patient dissatisfaction rate at 23.3%, while advanced 3D correction techniques like Lapiplasty showed significantly lower recurrence rates (0.8-3.0%) compared to traditional bunionectomy (25-50%).¹ The systematic review analyzing 16,273 procedures found nerve injury rates of 7.5% for simple bunionectomy compared to an average of 3.0% across all techniques.¹
| Procedure Type | Overall Complication Rate | Most Common Complication | Notable Advantage | Notable Disadvantage |
|---|---|---|---|---|
| 4th Gen MIBS (Early Adoption) | 11.1%² | Hardware failure (8.3%)² | No paresthesia, AVN, or hallux varus observed | Higher hardware failure during learning curve |
| Traditional Open Osteotomy | Variable¹ | Recurrence (4.9% average)¹ | Established technique, predictable outcomes | Higher nerve injury risk (3-7.5%) |
| Simple Bunionectomy | ~25-50%¹ | Recurrence (25-50%)¹ | Minimal surgical complexity | Highest dissatisfaction (23.3%), poor durability |
| Lapiplasty 3D Correction | 1-3%¹ | Hardware removal (1-3%)¹ | Lowest recurrence (0.8-3%), addresses TMT instability | Requires fusion, longer initial recovery |
| Distal Osteotomy | Low¹ | Recurrence (2.7-5.7%)¹ | Good for mild-moderate deformity | Limited correction capability |
| Proximal Osteotomy | Moderate¹ | Hallux varus (4.1%)¹ | Greater correction power | Higher overcorrection risk |
Requesting a Copy of This Report
If you’d like to request a PDF copy of this report or learn more about bunion surgery options, you can reach out to Geldwert Bunion Center for personalized information about advanced minimally invasive techniques, including the HyperFlex procedure.
Sources
- Barg A, Harmer JR, Presson AP, Zhang C, Lackey M, Saltzman CL. Unfavorable Outcomes Following Surgical Treatment of Hallux Valgus Deformity: A Systematic Literature Review. J Bone Joint Surg Am. 2018 Sep 19;100(18):1563–1573.
- Complication Rates During Early Adoption of Fourth-Generation Minimally Invasive Bunion Surgery. The Journal of Foot & Ankle Surgery. 2026 Jan-Feb;Volume 64.
- Atife M, Munro J, Hennessy C, Abram S, Brown R, Sharp B, Loizou C, Kendal A. 20-Year Complication, Revision, and Re-Operation Rates Following Over 150,000 Hallux Valgus Bunion Operations in England. British Orthopaedic Foot & Ankle Society. March 25, 2026.
- Meng J, Zhu Y, Li Y, Sun T, Zhang F, Qin S, Zhao H. Incidence and risk factors for surgical site infection following elective foot and ankle surgery: a retrospective study. J Orthop Surg Res. 2020 Oct 1;15:449.
- Park YU, Kim HN, Cho JH, Kim T, Kang G, Seo YW. Incidence and Risk Factors of Deep Vein Thrombosis after Foot and Ankle Surgery. Clin Orthop Surg. 2024 Nov 15;16(6):994–1000.
- Geldwert Bunion Center Research Study. Dr. Neal Geldwert. Westchester, NY & New York, NY. March 2026.
- Wiewiorski M, Barg A, Valderrabano V. Risk factors for wound complications in patients after elective orthopedic foot and ankle surgery. Foot Ankle Int. 2015;36(5):479-487.