A torn Achilles tendon does not always require surgery. Both surgical repair and non-operative treatment can produce good outcomes for acute ruptures, and the choice depends on your activity level, your tolerance for risk, and how quickly you need to recover. That said, the tradeoffs between the two paths are real and worth understanding before you decide.
Why Surgery Isn’t Automatic
For decades, surgery was considered the default for a complete Achilles rupture. That thinking has shifted. The American Academy of Orthopaedic Surgeons rates its recommendations for both surgical and nonsurgical management as “weak,” meaning the evidence doesn’t overwhelmingly favor one over the other for every patient. Modern non-operative treatment, which pairs immobilization with a structured rehabilitation protocol, produces results that overlap significantly with surgery in most measurable outcomes.
A study of long-term calf muscle performance found no significant differences between surgically and non-surgically treated patients seven years after rupture. Both groups showed similar results on single-leg heel-rise strength, power, and single-legged hop distance. In other words, the leg you’d expect to be weaker recovers to a comparable degree regardless of which route you take.
The Rerupture Tradeoff
The clearest advantage of surgery is a lower chance of the tendon tearing again. In a large trial published in the New England Journal of Medicine, the rerupture rate was 6.2% for patients treated without surgery, compared to just 0.6% for those who had either open or minimally invasive repair. That’s roughly a tenfold difference.
For someone whose livelihood or identity depends on physical performance, that gap matters a lot. For a less active person in their 60s, a 6% rerupture risk with non-operative care might be perfectly acceptable, especially when weighed against the complications that come with surgery.
What Surgery Risks
Surgery introduces its own set of problems. In a study of over 400 patients who had surgical repair, about 12.5% experienced at least one complication. The most common was blood clots in the leg veins (5.3%), followed by nerve irritation near the outer ankle (2.6%), surgical site infection (2.4%), rerupture (1.2%), and wound separation (1.0%). Of the 10 patients who developed infections, 8 needed a return to the operating room for cleaning and stronger antibiotics.
Timing also plays a role. When surgery is delayed beyond two weeks from injury, patients are modestly more likely to develop wound healing problems or nerve injury, depending on the technique used.
Open Repair vs. Minimally Invasive
If you do opt for surgery, there are two main approaches. Open repair involves a longer incision along the back of the ankle, giving the surgeon full visibility of the torn ends. This makes it easier to handle complex tears or perform additional procedures like reinforcing the repair with nearby tissue. The downside is a higher risk of wound complications and infection.
Minimally invasive (or percutaneous) repair uses smaller incisions and specialized instruments to stitch the tendon back together. Recovery tends to be similar, and one long-term study found slightly better patient-reported outcomes with the minimally invasive approach. However, this technique carries a higher risk of irritating the sural nerve, which runs close to the Achilles and provides sensation to the outer foot. Overall complication rates between the two techniques are comparable, around 10 to 14%.
Who Benefits Most From Surgery
Surgery tends to be favored for younger, active people who want to return to demanding physical activity. A review of 24 studies found that 65 to 100% of surgical patients returned to sport between 3 and 13.4 months after injury. Surgery is also associated with faster early recovery and a quicker path back to high-impact activities like running, jumping, and cutting sports.
Non-operative treatment works well for older adults, people with sedentary lifestyles, or those with health conditions that increase surgical risk (poor circulation, diabetes, smoking). If you’re not planning to sprint or play competitive sports, the functional outcomes are similar enough that avoiding the operating room is a reasonable choice.
Chronic Tears Are Different
Everything above applies to acute ruptures, meaning injuries treated within the first four to six weeks. If a torn Achilles goes undiagnosed or untreated beyond that window, it’s classified as a chronic rupture, and the calculus changes. The torn ends retract and scar tissue fills the gap, making the tendon far less likely to heal on its own in a functional position.
No studies have directly compared surgical and conservative treatment for chronic tears, largely because the evidence so strongly suggests surgery produces better results that a randomized trial would be hard to justify ethically. Chronic repairs also carry a higher infection rate and longer recovery compared to fixing a fresh tear. This is one reason getting an accurate diagnosis early matters: it preserves your options.
What Non-Operative Treatment Looks Like
Choosing not to have surgery doesn’t mean doing nothing. Non-operative management typically involves wearing a boot or cast that holds your foot in a toes-down position, allowing the torn ends of the tendon to sit close together while they heal. Over the course of several weeks, the angle is gradually adjusted toward a neutral position, and you begin a progressive rehabilitation program that builds strength and flexibility in the calf and ankle.
The protocol matters enormously. Early functional rehabilitation, where controlled movement and gradual weight bearing start within the first few weeks, produces significantly better outcomes than prolonged immobilization in a cast. If your doctor recommends non-operative treatment, ask specifically about the rehab plan. A structured, supervised program is what closes the performance gap between surgical and nonsurgical outcomes.