Achilles Tendon Repair

What happened

The Achilles is the strongest tendon in your body. It carries the entire force of your calf muscle into your heel bone, every step, and several times your body weight when you push off hard.

About two inches above the heel bone there is a stretch where the blood supply is at its thinnest. That is where it almost always tears.

The story is remarkably consistent. Someone pushes off to change direction — basketball, pickleball, tennis, chasing a grandchild — feels a sharp blow to the back of the leg, and turns around to see who kicked them. There is nobody there. Often they hear a pop.

Afterward you can usually still walk, flat-footed and slowly, because other muscles help. What you cannot do is push off, rise onto that toe, or climb stairs normally. That is the giveaway.

The typical patient is between 30 and 50, active but not competing daily — the tendon has stiffened with age but the person is still asking it to do sudden work. Certain antibiotics and steroid injections around the tendon also raise the risk.

Do you need an operation?

This is a real decision, and I want you to know it is a decision.

An Achilles rupture can heal without surgery. The two ends are held together in a boot with the foot pointed downward, and the tendon knits. The older studies showed clearly more re-ruptures without surgery, and that drove decades of practice. But those patients were casted rigidly for months. When non-operative treatment is done the modern way — a boot, an early return to weight bearing, and structured therapy — the gap between operating and not operating narrows considerably.

So the honest summary: surgery gives a somewhat lower re-rupture rate and a slightly stronger push-off, and it costs you a wound in an area with thin skin and poor blood supply. I lean toward repair for younger and more active patients, for larger gaps between the tendon ends, and for people whose work or sport demands full push-off power. I lean away from it for patients whose healing is already compromised — diabetes, smoking, poor circulation — where a wound complication is a much bigger problem than the rupture.

Either way, the rehabilitation matters more than the choice. That part is not optional.

How the operation goes

1. Anesthesia. Usually a general or spinal anesthetic, with a block to keep the leg comfortable afterward. You go home the same day.
2. The incision runs along the back of the leg, over the tendon, positioned to keep the wound away from where a shoe rubs.
3. Find both ends. A torn Achilles looks like a mop head — frayed strands rather than a clean cut.
4. Weave and tie. Heavy suture is woven up into each end and then tied, drawing the ends together.
5. Set the tension. This is the part that takes judgment: too loose and you lose push-off power for good; too tight and the ankle will not flex properly. I check it against your other leg's resting position.
6. Close carefully — the skin here is thin and unforgiving — and the leg goes into a boot with a heel lift.

Recovery: the boot and the wedges

You go home in a walking boot with a heel lift — about 2 cm, usually two or three wedges. That lift is not for comfort. It holds your foot pointed slightly downward, which keeps the two repaired ends close together and takes tension off the stitches. Do not remove the wedges unless I tell you to. They come out gradually as the tendon heals.

• First 2 weeksWeight on the leg as your pain allows — in the boot, wedges in place — starting right away. Crutches for balance the first few days. Sleep in the boot. Keep the incision dry. Elevate, because swelling here is what causes wound trouble. Aspirin 81 mg twice daily for two weeks. First visit at 10 to 14 days for a wound check and stitches out.
• 2–6 weeksTherapy starts, once or twice a week. Full weight in the boot, and a normal walking pattern in it. Gentle ankle motion out of the boot while seated — pointing down freely, and coming back up only as far as neutral. Wedges come out gradually.
• 6–12 weeksOut of the boot and into a shoe, often with a heel lift at first. Strengthening begins in earnest. The calf will look noticeably smaller than the other side — that is expected, and rebuilding it is the work of the next several months.
• 3–6 monthsProgressive strengthening, then hopping and running drills when your therapist says the calf is ready. Single-leg heel raises are the milestone everyone chases.
• 6–12 monthsBack to sport. This is a long recovery and I will not pretend otherwise. Push-off power is the last thing to come back.

The risks, honestly

• Wound healing problems The most important risk of choosing surgery. The skin over the Achilles is thin with a modest blood supply. Smoking and diabetes raise this risk sharply, which is why we address them first.
• Re-rupture Lower with surgery than without, but not zero. It most often happens in that window around three months when the tendon feels fine and is not yet strong.
• Blood clots Genuinely worth taking seriously here — a leg immobilized in a boot is a leg at risk. Stay moving, take the aspirin, and call us for new calf pain or swelling.
• Nerve irritation A small nerve runs near the incision; a patch of numbness on the outer heel or foot is not unusual.
• A permanently weaker calf Honest expectation: most people end up with a calf slightly smaller and a push-off slightly weaker than the other side, whether or not they had surgery. Most never notice in daily life.
• Stiffness Some loss of upward ankle flexion is common early and usually improves with therapy.