What’s the difference between Achilles tendinitis and a rupture?

Tendinitis/tendinopathy is a gradual overuse condition causing pain and stiffness with the tendon still intact. A rupture is a sudden complete tear, usually during a forceful movement, often with a snap and difficulty walking. A rupture needs prompt assessment.

Can I keep running with Achilles tendinopathy?

Usually you modify rather than stop entirely. The aim is to reduce aggravating load while doing progressive calf-strengthening exercises. Pushing through significant pain or ramping activity up too fast tends to prolong it – a graded return works better.

Why are steroid injections into the Achilles discouraged?

Corticosteroids can weaken tendon tissue, and injecting them into or around the Achilles is associated with a higher risk of rupture. For that reason they are generally avoided for this tendon, with exercise-based treatment preferred.

I’m on an antibiotic and my heel suddenly hurts – should I worry?

If it is a fluoroquinolone (a class linked to tendon injury), sudden tendon pain, swelling or difficulty moving the ankle should prompt you to stop the medication and seek medical advice promptly, as these drugs can rarely cause tendon rupture.

Do I definitely need surgery for a ruptured Achilles?

Not necessarily. Many ruptures are treated non-surgically with a brace or cast in a toes-pointed position plus structured rehab, and outcomes with modern programmes can be similar to surgery. Surgery may lower re-rupture risk but carries its own risks. It’s an individualised, shared decision, and recovery takes months either way.

Achilles Tendon Injury Singapore | Tendinopathy & Rupture

Written & reviewed by the BestDoctors.sg editorial team · Last updated 1 Sep 2026 · General information, not medical advice

Quick answer. The Achilles tendon connects the calf muscles to the heel bone and can be injured two main ways: gradual overuse (tendinopathy / tendinitis), causing pain and stiffness at the back of the ankle, or a sudden complete tear (rupture), which often happens during a forceful push-off in sport. Tendinopathy is managed mainly with load management and calf-strengthening exercises, while a suspected rupture needs prompt medical assessment because early decisions shape recovery.

Living with joint, back or bone pain that won’t settle?

Message our care team on WhatsApp. Tell us what’s going on and we’ll help you find the right orthopaedic surgeon — free, with no obligation.

Chat with our care team on WhatsApp

Not sure who to see? Find the right specialist →

In a medical emergency, or for severe or sudden symptoms such as breathing difficulty, chest pain, fainting or stroke signs, call 995 immediately.

The one warning to remember: feeling like you were kicked or hit in the back of the leg with a snap, then struggling to push off, suggests a rupture – get it assessed early.

Red flags – seek prompt care. Go to A&E or see a doctor urgently if you feel a sudden sharp pain, snap or a sensation of being kicked at the back of the ankle, especially during sport or a push-off, and then cannot walk properly, push off, or stand on tip-toe – a suspected Achilles rupture needs timely assessment. Also see a doctor for Achilles pain that is severe, not improving, or affecting your daily activities, or for any sudden tendon pain or swelling while taking certain antibiotics known to affect tendons.

What Achilles tendon problems are

The Achilles is the body’s largest and strongest tendon, joining the calf muscles to the heel bone and enabling the push-off used in walking, running and jumping. Because it takes so much load, it is prone to two very different problems. Achilles tendinopathy is an overuse condition – pain and stiffness that build up from repeated strain and small-scale wear within the tendon. An Achilles rupture is a sudden tear, often a complete one, that usually happens in an instant during a forceful movement. The two differ in how they start, how they feel and how they are treated, so telling them apart matters.

Achilles tendinopathy – symptoms

Tendinopathy usually comes on gradually. The main symptom is pain and stiffness at the back of the heel or a little above it, often worst first thing in the morning or at the start of activity, easing as the tendon warms up and sometimes returning afterwards. There is often tenderness when the tendon is pressed, and over time the tendon may feel thickened. The area can feel stiff after sitting for a while. Because the pain can settle during exercise, it is easy to keep pushing through it – but continuing to overload the tendon tends to prolong the problem rather than resolve it.

Achilles rupture – symptoms

A rupture typically strikes suddenly, often during sport or a sudden push-off, sprint or jump. People classically describe a sudden sharp pain and a feeling of being kicked or hit in the back of the ankle, sometimes with an audible pop or snap. Afterwards there is usually difficulty walking, weakness pushing the foot down, and trouble standing on tip-toe, along with swelling and sometimes a gap that can be felt in the tendon. Some people can still move the foot a little using other muscles, which is why a rupture can be missed without a proper examination. A suspected rupture needs prompt medical assessment.

Causes and who is at higher risk

Both conditions share overlapping risk factors. Common contributors include sudden increases in activity or training load, running and jumping sports, tight or weak calf muscles, and unsuitable footwear or a sudden change in shoes or training surface. Risk also rises with older age and with certain medical conditions that affect tendon health. Some medicines can weaken tendons – notably certain antibiotics and steroids – and can make tendinopathy or rupture more likely, particularly in older people. Resuming sport after a lay-off, or playing hard only occasionally, is a familiar pattern behind sudden ruptures.

How Achilles problems are assessed

Assessment usually begins with a history and physical examination. For suspected rupture, a doctor may use a calf-squeeze test: with the person lying face down and the foot relaxed, squeezing the calf normally makes the foot point downward, but this movement is reduced or absent when the tendon is completely torn. The doctor will also feel along the tendon for tenderness, thickening or a gap. Where the picture is unclear, or to confirm the extent of an injury, an ultrasound or MRI scan may be arranged. In Singapore, a GP, sports medicine doctor or orthopaedic surgeon can carry out this assessment and arrange imaging if needed.

Treatment of Achilles tendinopathy

Most tendinopathy is managed without surgery. The cornerstone is relative rest and activity modification – reducing rather than completely stopping the activities that aggravate it – combined with a structured physiotherapy programme. This centres on loading and strengthening exercises for the calf and tendon, alongside calf stretching and strengthening, which have the strongest support for reducing pain and improving function. Supportive measures include suitable footwear or a heel support and pain relief as advised, with a gradual return to activity as symptoms settle. Injections of steroid directly into the tendon are generally avoided, as they may weaken it. Tendinopathy can be slow to settle, so patience and consistency matter.

Treatment of Achilles rupture

A rupture needs prompt assessment so that treatment can begin in good time. It can be managed without surgery – typically in a boot or cast that holds the foot pointed, followed by a specific rehabilitation protocol – or with surgery to repair the tendon. Neither approach is universally “better” for everyone; the choice depends on the individual and is best made together with the specialist, weighing the person’s age, activity level and general health. Whichever route is chosen, it is followed by a graded rehabilitation programme to restore the tendon safely.

Recovery and rehabilitation

Recovery from either problem takes time, and a proper, gradual rehabilitation programme is central to a good outcome. Guided by a physiotherapist, rehab rebuilds calf strength, restores movement and gradually reintroduces the loads of walking, then sport. Progressing too quickly is a common reason for setbacks or re-injury, so returning step by step – rather than jumping straight back to full activity – helps protect the tendon while it regains its strength.

Preventing Achilles problems

Many Achilles problems can be reduced with sensible habits. Build training up gradually rather than in sudden jumps, and keep the calf muscles strong and flexible with regular strengthening and stretching. Wear good, well-fitting footwear suited to your activity, and warm up before sport. If pain appears, easing off early and adjusting your load tends to prevent a minor niggle from becoming a stubborn problem.

When to see a doctor

Seek prompt assessment if you feel a sudden snap or a sensation of being kicked at the back of the ankle, cannot push off or stand on tip-toe, or have sudden severe pain and swelling – a suspected rupture needs early evaluation, so attending A&E is reasonable. Also see a doctor for Achilles pain that is severe, not improving with rest and activity changes, or affecting your daily activities, and for any sudden tendon pain while taking a medicine known to affect tendons. A GP, sports physician or orthopaedic surgeon can guide treatment, and general health information is available on HealthHub.

Related bone, joint & muscle topics

Sources

OrthoInfo (AAOS) — Achilles tendon rupture: mechanism, symptoms (pop/snap), diagnosis and surgical vs non-surgical options.
Cleveland Clinic — Thompson (calf-squeeze) test: the bedside test for rupture.
US FDA — fluoroquinolone tendon boxed warning: tendinitis and tendon rupture risk.
Physiopedia / clinical references — eccentric calf-loading as the evidence-based mainstay for tendinopathy.

General information only. This guide is general information about a bone, joint or muscle condition and is not a diagnosis or personalised medical advice. See a doctor — a GP, sports physician or orthopaedic surgeon — for assessment, imaging and treatment. Go to A&E or call 995 for a suspected dislocation or broken bone, or for loss of bladder or bowel control, numbness around the groin, or severe or worsening weakness in the legs — these can be signs of serious nerve compression needing emergency care.

Achilles Tendon Injuries in Singapore: Tendinopathy & Rupture