Achilles Tendon Rupture Symptoms: How to Recognize It

What does an Achilles tendon rupture feel like?

The classic presentation of an acute Achilles tendon rupture includes:

• A sudden audible or felt pop at the back of the lower leg, often described as a snapping or cracking sensation
• Immediate pain in the heel and lower calf — though the pain sometimes subsides quickly, which can be misleading
• Inability to push off with the affected foot, making it difficult to walk normally or rise on tiptoe
• Swelling and bruising around the back of the ankle, appearing within hours
• A palpable gap in the tendon, about 2–6 centimeters above the heel bone, that a clinician can feel on examination

Ruptures most commonly occur during explosive push-off movements — sprinting, jumping, pivoting in court sports, or suddenly accelerating. Achilles tendon disorders affect approximately one million athletes per year worldwide, with complete ruptures peaking in adults in their third to fifth decade of life, and roughly 75% occurring in men 1Ref 1Shamrock AG, Dreyer MA, Varacallo M (2023).Achilles Tendon Rupture.Achilles tendon rupture epidemiology (incidence, peak age, sex distribution); Thompson test sensitivity/specificity 96–100%; over 20% of ruptures misdiagnosed initially.

How is Achilles rupture distinguished from tendinitis?

Achilles tendinopathy (tendinitis) builds up gradually over days or weeks. Pain is typically worst at the start of activity and in the morning, and the tendon feels tender to the touch. The key difference is that tendinopathy does not cause a sudden pop and does not eliminate the ability to push off or walk.

A rupture is an acute event. Even if someone can still walk after a rupture (because the plantaris muscle and other structures provide some push-off), they will have weakness and an abnormal gait. Importantly, over 20% of Achilles tendon ruptures are initially misdiagnosed — often confused with ankle sprains — which is one reason prompt evaluation matters 1Ref 1Shamrock AG, Dreyer MA, Varacallo M (2023).Achilles Tendon Rupture.Achilles tendon rupture epidemiology (incidence, peak age, sex distribution); Thompson test sensitivity/specificity 96–100%; over 20% of ruptures misdiagnosed initially.

The Thompson test is a bedside clinical test used to screen for rupture: with the patient lying face down and the knee bent to 90 degrees, a clinician squeezes the calf. In a healthy tendon, this produces foot plantarflexion (the foot points down). In a rupture, there is little or no movement. The Thompson test demonstrates sensitivity of 96–100% and specificity of 93–100% for complete rupture — but it must be performed by a clinician, not interpreted at home 1Ref 1Shamrock AG, Dreyer MA, Varacallo M (2023).Achilles Tendon Rupture.Achilles tendon rupture epidemiology (incidence, peak age, sex distribution); Thompson test sensitivity/specificity 96–100%; over 20% of ruptures misdiagnosed initially.

What imaging is used to confirm an Achilles rupture?

An experienced orthopedic clinician can often diagnose a complete Achilles rupture on physical examination alone. When the picture is unclear — for instance, in a partial tear — imaging is ordered:

• Ultrasound is the preferred first-line imaging for Achilles tendon injuries: it is inexpensive, real-time, and can show the location and extent of a tear, including the gap between ruptured tendon ends
• MRI provides more detailed tissue information and is used when surgical planning requires precise anatomy or when a partial tear is suspected

X-rays do not show the tendon itself but may be ordered to rule out an avulsion fracture at the heel bone.

What are the treatment options for a ruptured Achilles tendon?

Treatment is decided by an orthopedic surgeon and depends on several factors: the patient's age, activity goals, overall health, and whether the tendon ends are in close proximity.

Non-surgical (functional bracing): The foot is placed in a boot or cast in slight downward pointing (equinus) position, and the tendon ends are brought together without surgery. Progressive weight-bearing begins early. A systematic review and meta-analysis (29 studies, 15,862 patients) found that when accelerated functional rehabilitation is used, re-rupture rates with non-surgical treatment are similar to surgery (2.3% surgical vs 3.9% non-surgical overall, but no significant difference when functional rehab is applied) 2Ref 2Ochen Y, Beks RB, van Heijl M, Hietbrink F, Leenen LPH, van der Velde D, Heng M, van der Meijden O, Groenwold RHH, Houwert RM (2019).Operative treatment versus nonoperative treatment of Achilles tendon ruptures: systematic review and meta-analysis.Re-rupture rates: 2.3% surgical vs 3.9% non-surgical; no significant difference with accelerated functional rehab; surgical complication rate 4.9% vs 1.6% non-surgical (29 studies, 15,862 patients).

Surgical repair: The tendon ends are sutured together. Surgery is often preferred for younger, active individuals and for cases where the tendon ends are retracted far apart. Operative treatment carries a lower re-rupture rate overall but higher complication rates (4.9% vs 1.6%), primarily from wound infection 2Ref 2Ochen Y, Beks RB, van Heijl M, Hietbrink F, Leenen LPH, van der Velde D, Heng M, van der Meijden O, Groenwold RHH, Houwert RM (2019).Operative treatment versus nonoperative treatment of Achilles tendon ruptures: systematic review and meta-analysis.Re-rupture rates: 2.3% surgical vs 3.9% non-surgical; no significant difference with accelerated functional rehab; surgical complication rate 4.9% vs 1.6% non-surgical (29 studies, 15,862 patients).

Rehabilitation follows both pathways and is guided by a physical therapist, typically spanning 6–12 months before return to sport 3Ref 3Martin RL, Chimenti R, Cuddeford T, Houck J, Matheson JW, McDonough CM, Paulseth S, Wukich DK, Carcia CR (2018).Achilles Pain, Stiffness, and Muscle Power Deficits: Midportion Achilles Tendinopathy Revision 2018.Clinical features distinguishing Achilles tendinopathy from rupture and structured rehabilitation approach.

An orthopedic surgeon is the right specialist to assess and manage an Achilles rupture. Gale can help you find a sports medicine or orthopedic clinician and prepare your questions for that visit.