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Key Takeaways
- An Achilles tendon rupture usually happens suddenly, often during sport, and feels like being kicked in the back of the leg.
- It is most common in people aged 30–50, and men are several times more likely than women to be affected.
- Both surgical and non-surgical treatment can lead to a full recovery. The right choice depends on your age, activity level and how the tendon ends have separated.
You were playing badminton, or sprinting for the MRT, and your calf gave way. It felt like someone kicked you from behind, except no one was there. Now you're at home with a swollen ankle, unable to push off your foot properly, wondering if this is a sprain you can walk off or something that needs a doctor today.
That uncertainty is normal. An Achilles tendon rupture is often mistaken for a bad sprain in the first hour, because the pain can settle quickly and some people can still hobble on the foot. With partial tears, walking may be almost normal, but the tendon is still at risk of progressing to a complete rupture if not managed. The tendon itself doesn't hurt as much as you'd expect once it's fully torn. That's part of what makes this injury easy to miss.
What is Achilles tendon rupture?
The Achilles tendon connects your calf muscles to your heel bone. It's the thickest tendon in the body, and it takes an enormous amount of load every time you walk, run or jump.
A rupture means the tendon has torn, either partially or completely. Most ruptures happen a few centimetres above the heel, in a section of the tendon with a comparatively poor blood supply. That's also why this injury is more common after the age of 30, when the tendon has already lost some of its elasticity.
A complete rupture separates the tendon into two ends. Without the tendon transmitting force from the calf to the heel, you lose the ability to push off the ground on that foot.
Did you know?
The Achilles tendon takes its name from Achilles, the legendary Greek hero who, according to myth, could only be harmed at the back of his heel. Today, “Achilles’ heel” still means a person’s weakest point.
Achilles tendon is the thickest tendon in the body, and it takes an enormous amount of load every time you walk, run or jump.
Causes of Achilles tendon rupture
Most ruptures happen during sudden, forceful movement: a quick change of direction, an explosive sprint start, or landing awkwardly from a jump. Badminton, football and running are common triggers in Singapore, partly because they combine sudden acceleration with stop-start footwork.
A few factors raise the risk. Age between 30 and 50 is the biggest one, since tendon strength and blood supply decline with age even in people who feel fit. A history of Achilles tendinopathy (ongoing tendon pain or stiffness) weakens the tendon structurally before it ever ruptures. Certain antibiotics, particularly fluoroquinolones, are linked to a higher rupture risk. Returning to intense exercise after a long break, without rebuilding tendon strength gradually, is another common pattern.
Weekend athletes, people who play a sport occasionally rather than regularly, make up a disproportionate share of Achilles ruptures. The tendon simply isn't conditioned for the sudden demand.
Symptoms of Achilles tendon rupture
The classic description is a sudden, sharp pain at the back of the ankle, often described as being struck or kicked. Some people hear or feel a snap.
After the initial pain, you'll usually notice:
- Swelling around the heel and lower calf
- Difficulty walking normally, especially pushing off the injured foot
- Weakness when trying to stand on tiptoe
- A gap or dent you can feel a few centimetres above the heel bone, in a complete rupture
Not everyone experiences dramatic pain. Some people describe it as a dull ache rather than agony, and a few can still walk, just not normally. This is precisely why Achilles ruptures get misdiagnosed as ankle sprains in emergency settings without a proper clinical test.
Speak with our Care Team today to be matched with an orthopaedic specialist who can assess your condition, explain your options, and help you plan the next steps in your treatment.
How is an Achilles tendon rupture diagnosed?
Diagnosis usually starts with a conversation. The doctor will ask when the pain started, what you were doing at the time, and whether you heard or felt a pop. That history alone often points strongly toward a rupture before any physical test begins.
The main physical test is the Thompson test, sometimes called the Simmonds-Thompson test. You lie face down with your foot hanging off the edge of the table, calf muscles relaxed. The doctor squeezes your calf. In a healthy tendon, the foot points downward automatically. If the tendon is torn, the foot barely moves, sometimes not at all.
Some clinicians pair this with the Matles test. You bend your knees to 90 degrees while lying on your front. On the injured side, the foot tends to drop further than the uninjured side, since nothing is holding it in its normal resting position.
The doctor will also press along the tendon to feel for a gap, and check whether you can rise onto your toes unassisted, which becomes very difficult or impossible with a complete rupture.
Myth: “If I can still walk, my Achilles isn’t ruptured.”
Fact: Some people with a complete Achilles rupture can still walk, often awkwardly, by compensating with other muscles. Being able to walk does not rule out a rupture. Clinical tests (like the Thompson/calf‑squeeze test) are far more reliable than how the foot feels or looks in the first few hours.
Imaging isn't always necessary for diagnosis. When it's used, an ultrasound or MRI confirms how much of the tendon has torn and how far apart the ends have separated. That gap size matters, because it often decides whether non-surgical treatment is realistic.
Therapist palpating the Achilles tendon during a clinical assessment.
Treatment options for Achilles tendon rupture
There isn't a single right answer here. The two main paths, surgical repair and non-surgical management, can both lead to a good outcome. Singapore orthopaedic surgeons will typically weigh your age, activity level, tendon gap size and general health before recommending one over the other.
Non-surgical treatments
Non-surgical treatment tends to suit partial tears, less active patients, and anyone for whom surgery carries a higher risk. It relies on holding the tendon ends close together while the body heals them naturally, then rebuilding strength once that healing has taken hold.
- Immobilisation: The foot is held in a cast, brace or walking boot, with the ankle pointed downward to take tension off the tendon while it heals. The angle is adjusted gradually over several weeks as the tendon knits together.
- Physiotherapy: Once the initial healing phase is done, physiotherapy rebuilds strength and flexibility in the calf and tendon, in stages that match how far the repair has progressed.
- Activity modification: Weight-bearing and movement are scaled back for a period, so the tendon isn't loaded faster than it can handle.
- Pain management: Over-the-counter pain relief can help with discomfort during the early weeks, alongside the specialist's guidance on dosing.
The trade-off with this route is a slightly higher chance of re-rupture compared with surgery, and it depends on the tendon ends staying close enough together to heal well without stitching. That's why it's usually reserved for smaller gaps between the tendon ends, older patients, or those with health conditions that make surgery riskier.
Surgical treatments
Surgery is usually recommended for complete ruptures, competitive athletes, or anyone planning to return to a high level of activity. The method a surgeon chooses depends on the size of the tear, your general health, and how you intend to use the leg afterwards.
- Open surgery: The surgeon makes an incision at the back of the lower leg and stitches the torn tendon ends together directly. It's a well-established method, though it carries a higher risk of wound complications and infection than smaller-incision techniques.
- Minimally invasive surgery: Smaller incisions mean less disruption to the surrounding tissue, and often a quicker initial recovery. Percutaneous techniques, for example, pass sutures through a few small incisions rather than one long cut.
The main advantage of surgery is a lower re-rupture rate. The trade-off is the usual surgical risks: infection, nerve irritation near the incision, and a longer initial recovery before rehabilitation can properly begin.
How long does it take to recover from an Achilles tendon rupture?
Recovery from an Achilles tendon rupture is measured in months, whichever treatment path you take. Most people move through three broad phases: protection in a boot or cast for six to eight weeks, a gradual return to walking without support, and then a structured strengthening programme guided by physiotherapy.
Return to light activity, walking normally and cycling, for example, typically happens around three months. Return to sport, especially anything involving sprinting, jumping or sudden direction changes, is usually not recommended before four to six months, and some athletes take longer.
The tendon regains strength gradually, and rushing this process is the single biggest risk factor for re-rupture. A physiotherapist who works regularly with Achilles injuries will track your strength and hopping ability against the uninjured side, rather than working from a generic calendar.
How to prevent an Achilles tendon rupture
You can't eliminate the risk entirely, but a few habits reduce it meaningfully. Build up training intensity gradually after any break longer than a couple of weeks, rather than returning at your previous level. Include calf strengthening, particularly eccentric calf raises, as a regular part of training if you play sport with sudden acceleration or jumping. Warm up properly before explosive activity, since a cold tendon is a stiffer, less forgiving one.
If you've had Achilles tendinopathy (persistent tendon pain or stiffness) in the past, treat it seriously rather than pushing through it. A tendon that's already struggling under normal load is more likely to fail under sudden load.
How HiA helps
If you're experiencing persistent pain at the back of your heel or think you may have Achilles tendon rupture, Health in Asia (HiA) can help you connect with experienced orthopaedic specialists, sports medicine doctors and physiotherapists in Singapore.
Whether you need an assessment, a second opinion, or guidance on treatment options, HiA makes it easier to find and book appointments with the right healthcare provider.
Not sure whether your Achilles pain needs medical attention? Talk to our Care Team on WhatsApp —we'll help you understand your options and connect you with an appropriate specialist.
Frequently asked questions
No. Non-surgical management is a genuine option for many patients, particularly those who are older or less active. The decision depends on your specific tear and circumstances, which is best assessed by an orthopaedic surgeon who treats this injury regularly.
Most people return to their previous activity level, including sport, with appropriate treatment and rehabilitation. The timeline is measured in months: many are back between four and six months, but some need longer, especially for cutting, jumping or sprinting sports. Following a structured rehabilitation programme matters more than the treatment method chosen.
It varies. Some people describe intense pain at the moment of injury that eases quickly. Others describe a dull ache. Pain level alone isn't a reliable way to judge whether the tendon has ruptured.
Yes. Send us what you have. If anything's missing, we'll tell you exactly what to request and how.
Yes. Send us the report. We'll help you make sense of it, so you walk into the appointment with the right questions.
Yes, the Care Team will remain your point of contact for follow-up appointments, questions about medication, transitions between specialists, and anything new that comes up.
No. None of the specialists we recommend paid to be there. We match on clinical fit.
Disclaimer
This article and its contents are provided for educational and informational purposes only and do not constitute medical advice or professional services specific to you or your medical condition. For decisions about your health or treatment, speak with a qualified doctor who knows your situation. An…
How we reviewed this article:
Health in Asia has strict sourcing guidelines and relies on peer-reviewed studies, academic research institutions, and medical journals and associations. We only use quality, credible sources to ensure content accuracy and integrity. You can learn more about how we ensure our content is accurate and current by reading our editorial policy.
- Holm C, Kjaer M, Eliasson P. Achilles tendon rupture--treatment and complications: a systematic review. Scand J Med Sci Sports. 2015 Feb;25(1):e1-10. https://pubmed.ncbi.nlm.nih.gov/24650079/
- Achilles Tendon Rupture by Alan G. Shamrock; Mark A. Dreyer; Matthew A. Varacallo. https://www.ncbi.nlm.nih.gov/books/NBK430844/
