Achilles Tendon Rupture: Causes, Symptoms, and Treatments

Achilles tendon rupture is a common injury that affects the largest tendon in the human body. The Achilles tendon connects the calf muscles to the heel bone and plays a critical role in walking, running, and jumping.

Achilles tendon rupture occurs when the fibers of the tendon tear, causing pain, swelling, and difficulty walking. Individuals who engage in high-impact sports or activities and those with certain medical conditions are at an increased risk for this injury.

Treatment options include rest, ice, compression, physical therapy, and in some cases, surgery.

In this article, we will discuss the causes, symptoms, diagnosis, treatment, and prevention of Achilles tendon rupture, as well as recovery and potential complications. We will also review current research and clinical trials related to this injury.


Achilles tendon rupture is a common injury that occurs when the largest tendon in the human body, which connects the calf muscles to the heel bone, tears or ruptures.

This injury can cause severe pain, swelling, and difficulty walking, making it important to know its symptoms, causes, and risk factors, as well as possible treatments, prevention methods, and potential complications.

What is Achilles Tendon Rupture?

Achilles tendon rupture is a serious injury that affects the Achilles tendon, which is a strong and fibrous cord-like structure that attaches the calf muscles to the heel bone. It provides the power for activities such as running, jumping, and walking.

Achilles tendon rupture occurs when the tendon is subjected to excessive force or a sudden, sharp movement. The rupture can be partial or complete, and it may require different types of treatments depending on its severity.

Symptoms of Achilles Tendon Rupture

Achilles tendon rupture can cause a variety of symptoms, including:

  • Sudden and severe pain behind the ankle or calf
  • Swelling and stiffness
  • Difficulty or inability to walk or stand on the affected leg
  • A popping or snapping sound at the time of injury
  • Cramping and weakness in the calf muscles

Causes of Achilles Tendon Rupture

Achilles tendon rupture can be caused by several factors, including:

  • Physical trauma or injury, such as a fall or direct blow to the leg
  • Overuse or repeated stress on the tendon due to excessive running or jumping
  • Age-related degeneration of the tendon
  • Certain medical conditions or medications that weaken the tendon, such as diabetes or corticosteroids

Factors that Increase the Risk of Achilles Tendon Rupture

Several factors may increase the risk of developing Achilles tendon rupture, including:

  • Male gender
  • Age over 30
  • Certain medical conditions, such as rheumatoid arthritis
  • Excessive running or jumping
  • Poor flexibility or strength in the calf muscles
  • Wearing inappropriate footwear or shoes with improper support or fit

Diagnosis of Achilles Tendon Rupture

Physical Examination and Medical History

Diagnosis of Achilles tendon rupture typically begins with a physical examination and a review of medical history. During the exam, the doctor will ask about the patient’s symptoms and medical history, including any previous injuries or conditions that may be relevant.

They will also look for signs of a ruptured Achilles tendon, such as swelling, bruising, and difficulty walking or standing on the affected foot. The patient may be asked to perform certain movements, such as pointing the toes or standing on tiptoe, to assess the strength and flexibility of the affected foot and ankle.

The doctor may also perform the Thompson test, in which they squeeze the calf muscle while the patient lies face down, to see if the foot flexes normally.

If the foot does not flex, it may indicate a ruptured Achilles tendon. In some cases, imaging tests may be ordered to confirm the diagnosis or to rule out other conditions.

Imaging Tests

Imaging tests can provide more detailed information about the extent and location of an Achilles tendon rupture. The most commonly used imaging tests for this condition include ultrasound and magnetic resonance imaging (MRI).

Ultrasound uses sound waves to create images of the inside of the body and can help doctors visualize the rupture and assess the severity of the injury.

MRI uses a powerful magnetic field and radio waves to create detailed images of the inside of the body and can show the extent of the rupture and any associated soft tissue damage.

Both ultrasound and MRI are non-invasive and do not use ionizing radiation, making them safe and effective imaging options for diagnosing Achilles tendon ruptures.

The choice of imaging test will depend on various factors, including the severity and duration of symptoms, patient characteristics, and the preferences of the treating physician.

Treatment of Achilles Tendon Rupture

Nonsurgical Treatment

When treating Achilles tendon rupture, a doctor will first determine whether surgical or nonsurgical treatment is the best option. Nonsurgical treatment options are generally recommended for patients who are less active or have certain medical conditions that make them ineligible for surgery.

Rest and Ice

Rest and ice are typically the first line of treatment for Achilles tendon rupture. A patient may need to stay off their feet for several days or even weeks to allow the tendon to heal properly. Ice packs can be used to reduce swelling and inflammation.

Compression and Elevation

Compression and elevation are additional treatment options that can help reduce swelling and promote healing. Compression socks or wraps can be used to compress the area around the tendon, while elevating the foot can help improve blood flow to the area.


Over-the-counter pain medications, such as ibuprofen or acetaminophen, can help reduce pain and inflammation. Prescription pain medications may be necessary in some cases.

Functional Rehabilitation

Functional rehabilitation is a key part of nonsurgical treatment for Achilles tendon rupture. This may involve physical therapy exercises that help strengthen the muscles and improve range of motion in the affected foot and ankle.

This type of therapy can also help prevent future injury by improving ankle stability and balance.

The lack of a good process of physiotherapy may condition the quality of your recovery. The experience of your physical therapist with Achilles ruptured patients will be the cornerstone to succeed.

Surgical Treatment

If nonsurgical treatment fails or is not appropriate for the patient, surgery may be recommended to repair the torn tendon. Surgery may also be necessary if the rupture is severe or if the patient is an athlete or highly active individual who requires a full recovery.

Open Surgery

During open surgery, the surgeon makes an incision near the Achilles tendon and repairs the torn fibers using sutures. In some cases, a graft may be used to help reinforce the repair. Recovery time typically takes several months, and physical therapy is often necessary to regain strength and function in the affected foot and ankle.

Minimally Invasive Surgery

Minimally invasive surgery, also known as percutaneous surgery, is a newer technique that involves making several small incisions rather than one large one. This technique can result in less scarring and faster recovery times, but may not be appropriate for all cases of Achilles tendon rupture.

Postoperative Care and Rehabilitation

After surgery, a patient will typically need to wear a cast or brace to immobilize the foot and ankle. Recovery time can vary depending on the severity of the injury and the type of surgery performed. Physical therapy exercises are typically necessary to regain strength and range of motion.

To summarize, nonsurgical treatment options for Achilles tendon rupture include rest, ice, compression, elevation, medications and physical therapy exercises.

Surgical treatment may be necessary for more severe or activity-limiting cases, and can involve either open surgery or minimally invasive surgery techniques.

Postoperative care often involves immobilization and physical therapy exercises to promote healing and restore normal function to the affected foot and ankle.

Prevention of Achilles Tendon Rupture

Stretching and Strengthening Exercises

Stretching and strengthening exercises are key to preventing Achilles tendon rupture. In particular, stretching the calf muscles before exercise can help reduce the risk of injury. Incorporating exercises that target the calf muscles, such as calf raises and squats, into your workout routine can also help keep the Achilles tendon strong.

Some examples of calf-strengthening exercises include:

  • Single-leg calf raises
  • Double-leg calf raises
  • Seated calf raises
  • Calf raises on a stair or step

It’s important to start these exercises slowly and gradually increase intensity and duration over time.

Gradual Increase in Activities and Sports Participation

A gradual increase in activities and sports participation can also help prevent Achilles tendon rupture. Avoid sudden or drastic changes in your exercise routine or level of sports participation, as this can put additional stress on the tendon and increase the risk of injury.

Instead, slowly increase the intensity, duration, and frequency of your activities over time.

A good progress of loads can be one of the most important items to keep in your mind.

Footwear and Orthotics

Wearing appropriate footwear and orthotics can also help prevent Achilles tendon rupture. Choose shoes that provide adequate support and cushioning for your feet, and avoid wearing high heels or other shoes that place undue stress on the Achilles tendon.

Customized orthotics can also be helpful in providing additional support and cushioning for the feet and ankles. In conclusion, preventing Achilles tendon rupture involves a combination of regular stretching and strengthening exercises, a gradual increase in activities and sports participation, and proper footwear and orthotics.

Although there is no certainty of effectiveness, by following these guidelines, you can reduce your risk of experiencing this painful and debilitating injury.

Recovery and Rehabilitation of Achilles Tendon Rupture

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Recovery Timeline and Expectations

The recovery timeline and expectations following an Achilles tendon rupture may vary depending on the severity of the injury and the treatment performed.

Typically, it takes several months to return to normal activities, and up to a year to return to high-impact sports.

The first few weeks of recovery involve immobilization, which helps to promote healing and prevent additional damage.

But you don´t have to wait for such a long time, as many things can be done since the first days after your injury.

During this time, the patient may use crutches and a cast or brace to support the ankle and foot. After a few weeks, the cast is removed, and the patient may begin gentle range-of-motion exercises to prevent stiffness and maintain flexibility.

From week six to twelve, rehabilitation exercises are gradually increased, and weight-bearing activities are reintroduced.

The patient may start with low-impact exercises, such as cycling and swimming, before progressing to walking and jogging. It is important to comply with the rehabilitation program and follow the instructions given by the healthcare provider to avoid complications and speed up the recovery process.

Rehabilitation Exercises and Techniques

Following immobilization, patients with Achilles tendon rupture require a comprehensive rehabilitation program to restore strength, flexibility, and function of the affected leg and foot.

Rehabilitation exercises and techniques may include stretching, range-of-motion exercises, isometric exercises, bilateral exercises, balance training, proprioceptive exercises, and eccentric exercises.

The physical therapist may also use modalities such as ultrasound, laser therapy, and electrical stimulation to enhance tissue healing and reduce pain and inflammation.

A rehabilitation program typically lasts for several months and involves frequent evaluation and modification based on the patient’s progress.

Return to Sports and Activities

Returning to sports and activities after an Achilles tendon rupture requires careful planning, supervision, and gradual progression.

The patient should consult with the healthcare provider about the timing and intensity of sports participation based on the degree of healing, the level of fitness, and the goals of the patient. It is crucial to start with low-impact activities and gradually increase loads and intensity over several months.

Sports-specific training and conditioning may help to improve performance and prevent re-injury. Protective equipment, such as ankle supports and braces, may also be recommended.

It is important to listen to the signals of the body, such as pain, swelling, and fatigue, and adjust the activity accordingly. Regular follow-up visits with the healthcare provider may help to monitor progress and prevent complications.

Complications and Risks of Achilles Tendon Rupture

Achilles tendon rupture is a serious injury that can cause a variety of complications and risks. These include:


Infection is a potential complication after surgery for Achilles tendon rupture. While rare, it can occur if bacteria enters the wound during surgery or postoperative wound care is inadequate. Patients may experience redness, warmth, swelling, drainage, fever, and chills.

Treatment involves antibiotics and additional procedures to clear the infection, such as wound irrigation, debridement, and drainage.

Wound Healing Problems

Wound healing problems can occur after surgery for Achilles tendon rupture, particularly if the patient has underlying medical conditions that impair healing or if the surgical incision becomes infected or opens up. Delayed healing may cause pain, swelling, redness, and drainage from the wound.

Treatment involves wound care, immobilization, and possibly additional surgery.

Nerve Damage

Nerve damage is a possible complication after surgery for Achilles tendon rupture. While rare, it can result in numbness, weakness, and loss of sensation in the foot and ankle. The extent and duration of nerve damage vary depending on the location and severity of the injury.

Treatment involves nerve testing, monitoring, and possibly surgery.


Rerupture is a risk after Achilles tendon rupture, particularly in patients who do not follow postoperative instructions or who return to high-impact activities too soon. Rerupture may cause a popping or snapping sensation, pain, swelling, and limited range of motion.

Treatment involves repeat surgery or nonsurgical methods, depending on the severity of the injury. In addition to these complications, Achilles tendon rupture can lead to long-term consequences such as chronic pain, stiffness, weakness, and decreased mobility.

Therefore, it is important to seek prompt and appropriate medical treatment to prevent complications and to ensure proper healing and recovery.

Clinical Trials and Research on Achilles Tendon Rupture

Current Research and Findings

Recent studies on Achilles tendon rupture have focused on improving the accuracy of diagnosis, identifying risk factors, refining treatment strategies, and exploring new therapies for the condition. Some of the most notable findings from these studies are:

  • Diagnostic accuracy: Advances in imaging technology, such as ultrasound and magnetic resonance imaging (MRI), have increased the precision of diagnosing Achilles tendon rupture. MRI has been shown to have a high sensitivity and specificity for detecting partial ruptures of the tendon, which were previously difficult to diagnose accurately.
  • Timing of surgery: While immediate surgical repair was once considered the gold standard for treating Achilles tendon rupture, recent studies have suggested that delaying surgery for up to two weeks after the injury may lead to better outcomes and lower complication rates. This delay allows for the acute inflammatory response to subside and for the formation of a protective scar tissue before the tendon is repaired.
  • Functional rehabilitation: Current research has shown that functional rehabilitation, which involves early mobilization and weight-bearing exercises, may result in faster recovery and better long-term outcomes than traditional immobilization. This approach has been found to increase muscle strength, improve joint range of motion, and reduce the risk of reinjury.
  • New therapies: Several emerging therapies for Achilles tendon rupture show promise in accelerating healing and reducing recovery time. Platelet-rich plasma (PRP) therapy, for example, involves injecting high concentrations of growth factors from a patient’s own blood into the damaged tendon to stimulate tissue repair. Mesenchymal stem cell therapy, which uses stem cells harvested from fat tissue to promote tissue regeneration, is also being explored as a potential treatment option.

Future Directions and Potential Treatments

As researchers continue to study Achilles tendon rupture, several areas of investigation are being pursued to improve diagnosis, treatment, and prevention of the condition. Some of the potential treatments and future directions being explored include:

  • Biomarkers: Several biomarkers, such as proteins and molecules found in the blood or tissue, have been identified as potential indicators of Achilles tendon rupture. Researchers are exploring the use of these biomarkers to aid in diagnosis, prognosis, and monitoring of the condition.
  • Tissue engineering: Advances in tissue engineering are leading the way for the development of novel therapies for Achilles tendon rupture. These therapies involve the use of biomaterials, cells, and growth factors to create new tendon tissue, repair damaged tissue, and promote tissue regeneration.
  • Gene therapy: Gene therapy, which involves altering the expression of genes in a patient’s cells, is being investigated as a potential treatment for Achilles tendon rupture. Researchers are exploring the use of gene therapy to stimulate the production of growth factors and structural proteins that can enhance tendon healing and regeneration.
  • Preventive strategies: Many researchers are focused on developing preventive strategies to reduce the incidence of Achilles tendon rupture. Studies are underway to identify risk factors, such as genetic factors and lifestyle behaviors, as well as to develop interventions, such as personalized exercise programs and shoe modifications, that can reduce the risk of injury.


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