The Achilles tendon, the largest and strongest tendon in the human body, connects the calf muscles to the heel bone and helps in walking, running, and jumping. When this tendon sustains damage, it can affect mobility and quality of life. This article explores the various types of Achilles tears, their symptoms, and treatment options to inform you about this common injury.
What is the Achilles Tendon?
The Achilles tendon is a fibrous band connecting the calf muscles to the heel bone. It is approximately 15 cm long, narrowing as it descends before attaching to the heel. This tendon enables the foot to point downward, allowing walking, running, and jumping. The Achilles has a relatively poor blood supply, particularly 2-6 cm above the heel insertion point, which can slow healing when injuries occur in this area.
Types of Achilles Tears
Achilles tears can be categorised based on their severity, location, and nature. These distinctions affect the appropriate treatment approach and recovery expectations.
Partial Tears (or Strains)
Partial tears occur when some, but not all, of the tendon fibres are damaged. These injuries can vary in severity and are often classified into grades.
Grade 1: These are mild stretches or minor tears affecting a small number of fibres. The tendon remains intact and functional, though some discomfort may be present. Patients typically experience mild pain, minimal swelling, and little to no loss of strength or mobility.
Grade 2: These moderate tears involve damage to a larger portion of the tendon fibres. Symptoms include noticeable pain, swelling, tenderness to touch, and some loss of strength and mobility. Walking may become painful, especially when pushing off with the affected foot.
Grade 3: These severe partial tears involve significant damage to the tendon while still maintaining some intact fibres. They cause substantial pain, swelling, bruising, and significant weakness. Without proper treatment, these tears can progress to complete ruptures.
Complete Ruptures
A complete rupture represents a full-thickness tear where the tendon is completely severed. This injury typically causes immediate and severe symptoms.
Acute Ruptures: These occur suddenly, often during athletic activities that involve quick, forceful movements. Patients frequently report hearing a “pop” or “snap” sound at the moment of injury, followed by immediate pain and inability to bear weight on the affected leg.
Chronic Ruptures: Some ruptures may develop gradually over time, especially in individuals with pre-existing tendinopathy or those who continue to engage in physical activity despite persistent tendon pain. These tears may not present with the classic “snap” but progressively worsen until complete failure occurs.
Neglected Ruptures: When complete ruptures go untreated for extended periods (typically more than 4-6 weeks), they are considered neglected ruptures. These present unique treatment challenges due to tendon retraction, tissue degeneration, and muscle atrophy.
Insertional vs Non-insertional Tears
The location of the tear within the tendon also serves as an additional classification system.
Insertional Tears: These occur at or near where the Achilles tendon attaches to the heel bone. They frequently develop in conjunction with Haglund’s deformity (a bony enlargement on the back of the heel) or retrocalcaneal bursitis. Insertional tears often involve calcification of the tendon and may develop more gradually.
Non-insertional Tears (Mid-substance): These tears occur in the middle portion of the tendon, typically 2-6 cm above the heel insertion. This region has a poorer blood supply, which can affect healing potential. Non-insertional tears commonly affect active individuals between 30 and 50 years old and may develop after periods of increased activity.
Musculotendinous Junction Tears: Though less common, tears can also occur where the tendon meets the calf muscles. These injuries may involve both tendon and muscle tissue and typically result from sudden, forceful contractions.
Signs and Symptoms of Achilles Tears
Being aware of Achilles tear symptoms helps in seeking timely medical attention.
Pain and Tenderness: Pain may range from mild discomfort to severe, sharp pain depending on the extent of the tear. In partial tears, pain typically increases with activity and improves with rest. Complete ruptures may cause intense initial pain followed by less pain due to nerve separation.
Swelling and Bruising: Noticeable swelling often develops around the ankle and lower calf, sometimes accompanied by bruising that extends down toward the heel or along the foot. The area may feel warm to the touch due to inflammation.
Functional Limitations: With partial tears, walking may be painful but still possible. Complete ruptures typically result in difficulty or inability to push off with the affected foot, rise onto tiptoes, or climb stairs. Many patients describe a feeling of having been “kicked” in the back of the leg.
Physical Changes: A visible gap may be felt or seen in the tendon with complete ruptures. The calf squeeze test (Thompson test), where squeezing the calf muscle does not produce the normal foot plantarflexion, indicates a complete rupture.
Achilles Tear Treatment Options
Non-surgical Management
Non-operative treatment is commonly employed for partial tears and may be considered for complete ruptures in certain populations.
RICE Protocol: Rest, ice, compression, and elevation help manage pain and swelling. Rest involves avoiding activities that cause pain, while ice, compression bandages, and elevation help control inflammation.
Immobilisation: For partial tears, a walking boot or brace may be prescribed to limit movement while the tendon heals. Complete ruptures treated non-surgically typically require a cast or boot with the foot positioned in plantarflexion for 6-8 weeks, followed by gradual rehabilitation.
Physiotherapy: Once the acute phase has passed, a structured rehabilitation programme helps restore strength, flexibility, and function. This includes progressive loading exercises, balance training, and eventually sport-specific drills for those returning to athletic activities.
Surgical Management
Surgery may be recommended for complete ruptures, particularly in younger, active individuals, or for partial tears that do not respond to conservative treatment.
Open Repair: Traditional open surgery involves a larger incision to directly visualise and suture the torn tendon ends. This approach may be necessary for complex tears or those with significant tendon degeneration requiring debridement or augmentation.
Minimally Invasive Techniques: Procedures such as percutaneous repair or mini-open approaches use smaller incisions, potentially reducing wound complications and allowing faster recovery. However, they may not be suitable for all types of tears.
Conclusion
Achilles tendon tears range from minor strains to complete ruptures, each requiring different approaches to treatment and rehabilitation. Early diagnosis and appropriate intervention improve outcomes and reduce the risk of long-term complications. With proper care and rehabilitation, most patients can expect to return to their previous level of activity, though this process requires patience and dedication to recovery protocols.
Schedule a consultation today to receive personalised advice about your Achilles tendon concerns.
