High ankle sprain surgery is the repair used when the ligaments that hold your two lower leg bones together tear badly enough that the ankle is no longer stable. Most ankle sprains never come close to needing it. This one sometimes does.
After more than twenty years in practice, this is still the injury I see mislabeled most often. Someone is told they rolled an ankle, handed a wrap, and six weeks later they still cannot push off.
What is a high ankle sprain?
A high ankle sprain is a tear of the syndesmosis: the group of ligaments that binds your tibia (shin bone) to your fibula (the smaller bone on the outside of your leg) just above the ankle joint.
Four structures do that job. The anterior inferior tibiofibular ligament sits in front, the posterior inferior tibiofibular ligament sits behind, the transverse ligament crosses the back, and the interosseous membrane runs up the leg between the two bones.
Think of them as a strap holding two poles side by side. Every time you land, the ankle bone below wedges up between those two poles and tries to spread them. The syndesmosis is what stops that from happening.
These injuries are not common. Published series put syndesmotic sprains at roughly 1 to 18 percent of all ankle ligament injuries, and that wide range tells you something: they get under-reported because they get under-diagnosed.
How is a high ankle sprain different from a regular rolled ankle?
The difference is where it hurts and how it happened. A standard sprain hurts on or just below the bony bump on the outside of your ankle. A high ankle sprain hurts above the joint line, often several centimeters up the leg.
The mechanism is different too. A rolled ankle usually turns inward. A high ankle sprain usually happens when the foot is planted and the body rotates over it, twisting the foot outward while the ankle bends up toward the shin.
Here is what I tell my patients: if the sore spot is above your ankle bone rather than on it, I want a closer look. That single detail changes the whole conversation.
What causes a high ankle sprain?
Most happen in contact and cutting sports. Football, basketball, soccer, hockey, wrestling, and skiing produce the majority of them, usually through a collision or a planted-foot pivot.
They also occur alongside ankle fractures. When the fibula breaks, the syndesmosis often tears with it, which is one reason every ankle fracture gets tested for stability.
How is a high ankle sprain diagnosed?
Diagnosis comes from a focused exam plus imaging, and the exam usually tells me more than the X-ray does.
I map tenderness first. Pain that runs several centimeters up the leg from the ankle points toward the syndesmosis. Then I use two provocative tests: squeezing the calf where the tibia and fibula sit together, and gently rotating the foot outward with the ankle flexed up. Pain with either one raises my suspicion sharply.
Imaging follows. Standard X-rays rule out fracture and show the gap between the tibia and fibula. Weight-bearing or stress views are often more revealing, because an unstable syndesmosis can look normal until the leg is loaded. MRI shows the ligaments themselves and is the most sensitive study for the soft tissue.
The question I am really trying to answer is not how bad the tear looks. It is whether the joint is stable.
Does a high ankle sprain always need surgery?
No. Most high ankle sprains do not need surgery at all.
If the syndesmosis is stretched but stable, it heals with protection and time. That usually means a walking boot, crutches or a knee scooter early on, anti-inflammatory medication, and a structured rehab program once the swelling settles. Expect roughly six to eight weeks before you feel close to normal, and longer before you are back to sport.
Surgery enters the picture in three situations: the two leg bones separate under stress (a finding called diastasis), the syndesmosis is torn as part of an ankle fracture, or a sprain treated without surgery leaves the ankle unstable and painful months later.
I am direct with patients about why that distinction matters. A syndesmosis that heals in the wrong position changes how load passes through the ankle, and that is a setup for stiffness, chronic pain, and early arthritis. This is one of the few sprains where waiting too long carries a real cost.
What happens during high ankle sprain surgery?
The surgeon puts the tibia and fibula back into their correct relationship and holds them there while the ligaments heal. That is the entire goal.
The operation is usually done as a same-day outpatient procedure under general or spinal anesthesia, often with a nerve block for pain control afterward. Many surgeons start with an arthroscopy, placing a small camera in the joint to check the cartilage and clean out inflamed tissue.
Next comes a small incision over the outside of the ankle. Scar tissue blocking the two bones from sitting together is cleared, the syndesmosis is reduced into position, and live X-ray confirms the alignment before anything is fixed.
Fixation goes in last. A stress X-ray confirms the joint holds, any associated fracture is repaired, and the ankle goes into a splint or boot.
Is high ankle sprain surgery done with screws or a suture-button device?
Both are used, and the suture-button implant (commonly called a TightRope) has become the more common choice in athletes.
Screw fixation is the traditional method and still the most widely used overall. One or two screws pass from the fibula into the tibia, sometimes through a small plate. Screws are rigid and reliable, but they hold the two bones completely still, and some surgeons remove them at three to six months.
The suture-button device works differently. A strong braided suture runs between two small metal buttons, one against the tibia and one against the fibula, tensioned to pull the bones together. It allows a small amount of natural motion at the syndesmosis, rarely needs to come out, and permits earlier weight bearing.
Neither one is automatically the right answer. Fracture pattern, bone quality, activity level, and the surgeon’s own results all factor in.
This is also the point where I hand off. Ankle syndesmosis reconstruction belongs with our foot and ankle and sports medicine surgeons, and if that is what you need, my job is getting you in front of the right partner quickly rather than slowly.
How long is recovery after high ankle sprain surgery?
Recovery runs from about six weeks to six months depending on the fixation used, whether a fracture was involved, and what you are going back to.
Traditional protocols are conservative: splinted for the first ten to fourteen days, off the leg for six to eight weeks, then into a boot. Running sports typically wait at least three months.
Accelerated suture-button protocols move much faster. Published rehabilitation protocols describe partial weight bearing within the first week, full weight bearing out of the boot by around day twenty, a running progression once walking is pain free, and return-to-play testing between four and six weeks. Some authors report return to sport in under two months, compared with three to six months after screw fixation.
Those numbers describe reported protocols, not a promise. Your surgeon sets your timeline based on your ankle, not on a published table.
A few things are consistent no matter which route you take:
- Swelling lingers. Months, not weeks. It is normal and it is not a sign that something failed.
- Stiffness is the main enemy. Physical therapy is not optional after this operation.
- Strength work goes above the ankle. Hip and core strength control how your foot lands, and skipping it invites reinjury.
- Return to sport is earned by testing, not by the calendar. Hop tests, agility runs, and side-to-side symmetry decide it.
When should you see an orthopaedic surgeon in Middle Tennessee?
Get evaluated if you cannot put weight on the leg, if the pain sits above your ankle bone, if swelling has not started settling after three or four days, or if an ankle you sprained weeks ago still feels like it might give out.
Do not wait on that last one. A sprain that is still unstable at six weeks is telling you something.
Our team at the Bone and Joint Institute of Tennessee sees patients from Franklin, Nashville, Brentwood, Spring Hill, Columbia, and across Middle Tennessee. We are at 3000 Edward Curd Lane, Franklin, TN 37067, and you can reach the office at (615) 791-2630.
You can request an appointment online. If your injury needs syndesmosis repair, we will route you to the right surgeon in our group and stay involved.
Watch: why a high ankle sprain makes walking difficult
Twenty-seven seconds on why weight bearing is the symptom that matters most with this injury.
References and Further Reading
- Voight ML, et al. Management of high ankle sprains utilizing the tightrope surgical procedure. Int J Sports Phys Ther. 2024;19(5):513-521. View study
- Hunt KJ, et al. High ankle sprains and syndesmotic injuries in athletes. J Am Acad Orthop Surg. 2015;23(11):661-673. View study
- de-Las-Heras Romero J, et al. Management of syndesmotic injuries of the ankle. EFORT Open Rev. 2017;2(9):403-409. View study
- Naqvi GA, et al. Tightrope fixation versus syndesmotic screw fixation: accuracy of syndesmotic reduction. Am J Sports Med. 2012;40(12):2828-2835. View study
- Vancolen SY, et al. Return to sport after ankle syndesmotic injury: a systematic review. Sports Health. 2019;11(2):116-122. View study
- Sman AD, et al. Prognosis of ankle syndesmosis injury. Med Sci Sports Exerc. 2014;46(4):671-677. View study
- American Orthopaedic Foot and Ankle Society. High ankle sprain (syndesmotic injury). FootCareMD
- American Academy of Orthopaedic Surgeons. Sprained ankle. OrthoInfo
Medical disclaimer: this article is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Individual results vary. Always talk with a qualified healthcare provider about your own injury before making treatment decisions.
