Overview
The Achilles is the strongest tendon in the body. It connects the calf muscles to the heel bone (calcaneus). When it ruptures, you lose the ability to push off the foot. That is the force you rely on to sprint, jump, and climb stairs. The classic story is a middle-aged weekend athlete. During a sudden push-off, a sprint, jump, or pivot, they hear a pop. It feels as though someone kicked them in the back of the ankle.
The tendon sits close under the skin and has only a modest blood supply. Its torn ends do not always close their own gap reliably. Surgical repair reconnects those ends. It lets you begin earlier, more progressive rehab than non-operative treatment allows. The trade-off is a small surgical wound over that thin-skinned tendon. That trade is accepted in exchange for a lower re-rupture rate and a more predictable return to push-off strength.
How the Procedure Works
The repair is done through an incision on the back-inner side of the ankle. Your surgeon opens the thin sheath that wraps the tendon (the paratenon) and finds the torn ends inside it. The ragged edges are trimmed back to healthy tissue. The two ends are then sewn together with strong stitches in a locking pattern that grips the tendon without cutting through it. The repair is set to match the natural resting position of your opposite ankle. That way the two sides sit at the same angle once you heal.
In old or neglected ruptures, the gap between the ends can be too large to bridge directly. In those cases a piece of nearby tendon is brought over to fill the gap. Often that is the tendon that bends your big toe, which runs close by. The sheath is closed back over the repair. The ankle is then splinted in a slightly pointed-down position to take tension off the stitches while they begin to heal.
When to Consider Achilles Tendon Repair
Repair is generally offered when your injury, your activity level, and your goals together point to surgery as the next step. The typical patient profile:
Acute complete rupture in an active patient
Younger or athletic patients with an acute rupture benefit from repair. It allows earlier movement and has a lower re-rupture rate than non-operative care.
Chronic rupture with persistent weakness
Patients who were initially treated without surgery but still have noticeable push-off weakness and a gap you can feel in the tendon.
Treats: Achilles Tendon Rupture
Risks & Why We Still Recommend It
Every operation carries risk. This procedure is offered because the condition, when left untreated, can cause a higher re-rupture rate and a weaker, less predictable return of push-off strength. The decision to proceed weighs the risks of surgery against the limitations the condition places on daily function. Surgery does not remove risk; it addresses a problem that is otherwise progressive. Whether it is appropriate is determined for each patient in consultation with the surgeon.
The risks we discuss with you before Achilles tendon repair include:
- wound complications, the most common concern, because the tendon sits close under the skin with a modest blood supply
- infection
- re-rupture
- injury to the sural nerve, which can cause numbness on the outer side of your foot
- blood clot in the leg
- stiffness
Surgery makes sense for a complete rupture, or a chronic one with lasting push-off weakness. The patient's activity level has to make the more predictable recovery worth the surgical wound.
Frequently Asked
questions we hear in clinicHow do I know my Achilles ruptured?
The classic story is a middle-aged weekend athlete. During a sudden push-off, a sprint, jump, or pivot, they hear a pop, and it feels as though someone kicked them in the back of the ankle. After the rupture you lose the ability to push off the foot, the force you rely on to sprint, jump, and climb stairs.
Can the tendon heal without surgery?
The tendon has only a modest blood supply, and its torn ends do not always close their own gap reliably. Healing it without surgery leaves a higher re-rupture rate and a less predictable return of push-off strength. Repair reconnects the ends and lets you begin earlier, more progressive rehab.
What if my rupture happened a while ago?
In old or neglected ruptures, the gap between the ends can be too large to bridge directly. In those cases a piece of nearby tendon is brought over to fill the gap, often the tendon that bends your big toe, which runs close by.
What is the biggest risk?
Wound complications are the most common concern, because the tendon sits close under the skin with a modest blood supply. The other risks we discuss include infection, re-rupture, injury to the sural nerve (which can cause numbness on the outer side of your foot), blood clot in the leg, and stiffness.
Why is my ankle splinted pointing down after surgery?
The slightly pointed-down position takes tension off the stitches while they begin to heal. The repair itself is set to match the natural resting position of your opposite ankle, so the two sides sit at the same angle once you heal.
Further Reading
External patient-education references and related OSI pages for additional background:
