Achilles Pain: When It's Tendinitis vs. a Tear

Achilles tendinitis and Achilles tendon tears are two common sources of pain at the back of the ankle. Both can sideline you from daily activities and sports, but they differ in how they start, what you feel, and how they're treated. Understanding the key differences can help you get the right care sooner and prevent further damage.

What Is Achilles Tendinitis?

Achilles tendinitis is an overuse injury of the Achilles tendon, the thick band that connects your calf muscles to your heel bone. It often develops gradually and can become chronic if not managed properly.

Typical features of Achilles tendinitis:

• Gradual onset of aching or stiffness, especially after activity
• Mild swelling or "thickening" of the tendon
• Tenderness when you press along the back of your heel
• Pain that improves with warm-up but worsens with intense or prolonged activity
• Stiffness first thing in the morning or after long periods of rest

Common risk factors:

• Sudden increase in training volume or intensity
• Tight calf muscles or poor flexibility
• Inadequate footwear (poor cushioning or support)
• Running or jumping sports on hard surfaces
• Age (more common over 30)

What Is an Achilles Tendon Tear?

An Achilles tendon tear (or rupture) is a partial or complete break in the tendon fibers. It often occurs suddenly during high-force activities, such as sprinting, jumping or pushing off forcefully.

Key features of an Achilles tear:

• Sudden, sharp pain or a "pop" sensation in the back of the ankle
• Immediate difficulty walking or bearing weight on the affected leg
• Visible swelling or bruising around the heel
• Weakness or inability to stand on tiptoe
• Gap or dent you can sometimes feel in the tendon about 2–3 cm above the heel bone

How to Tell Tendinitis and a Tear Apart

Feature	Achilles Tendinitis	Partial/Complete Tear
Onset	Gradual, over days to weeks	Sudden, during activity
Pain Quality	Aching, stiffness	Sharp, stabbing, "pop"
Weight-bearing	Painful but usually possible	Difficult or impossible
Swelling	Mild to moderate	Often significant
Muscle strength	Generally preserved	Markedly reduced
Physical exam tests	Tender along tendon	Positive Thompson test (calf squeeze)

Diagnosing Your Achilles Injury

Accurate diagnosis usually starts with your medical history and a focused exam. Your healthcare provider will:

• Ask about how and when the pain began
• Palpate the tendon to check for tenderness or gaps
• Test range of motion and calf-squeeze (Thompson) test
• Evaluate your walking and ability to stand on tiptoe

Imaging may include:

• Ultrasound: shows tendon structure, inflammation, partial tears
• MRI: detailed view for severe or complex cases

If you're experiencing heel or ankle pain and want to better understand what might be causing it, try Ubie's free AI-powered symptom checker to get personalized insights in just 3 minutes and learn whether you should see a specialist.

Treatment Strategies

Prompt, appropriate treatment speeds recovery and lowers the risk of recurrence. Here's how approaches differ:

Achilles Tendinitis

1. Rest & Activity Modification

   • Reduce high-impact activities (running, jumping)
   • Switch to low-impact options (swimming, cycling)

2. Ice & Anti-Inflammatory Measures

   • Ice 15–20 minutes, 2–3 times daily
   • Over-the-counter NSAIDs (ibuprofen, naproxen) as directed

3. Stretching & Strengthening

   • Gentle calf stretches (wall push-ups)
   • Eccentric strengthening exercises (heel-drop routines)

4. Physical Therapy

   • Gradual loading programs
   • Soft tissue mobilization and ultrasound therapy

5. Footwear & Orthotics

   • Supportive shoes with heel cushioning
   • Heel lifts or custom orthotics to reduce tendon strain

Recovery time: 4–12 weeks, depending on severity and compliance with therapy.

Achilles Tendon Tear

1. Immediate Care (First 48 Hours)

   • Rest, ice, compression, elevation (RICE)
   • Immobilize with a brace or walking boot

2. Non-Surgical vs. Surgical Options

   • Non-surgical: functional bracing with gradual weight-bearing
   • Surgical: tendon repair, best for complete ruptures in active individuals

3. Rehabilitation

   • Early controlled motion under guidance
   • Progressive strengthening, balance work
   • Return to full activity typically 4–6 months post-repair

Recovery time:

• Non-surgical: 4–6 months, depending on healing and rehab
• Surgical: 5–8 months, may vary with patient factors

When to Seek Immediate Medical Attention

While most Achilles issues aren't life-threatening, certain signs warrant prompt evaluation:

• Inability to walk or bear weight
• Sudden onset of severe pain and swelling
• Visible gap or dent in the tendon
• Numbness or tingling in the foot
• Signs of infection (redness, warmth, fever) around any incision or injection site

Speak to a doctor if you experience any of the above or if basic self-care (RICE, gentle stretching) doesn't improve symptoms within two weeks.

Preventing Future Achilles Injuries

Keeping your Achilles tendon healthy involves balanced training and good habits:

• Warm up thoroughly before exercise
• Incorporate calf-strengthening and flexibility exercises
• Increase training load by no more than 10% per week
• Choose shoes that match your foot type and activity
• Cross-train to avoid overuse of the same muscles

Final Thoughts

Achilles tendinitis and tears can be painful and disruptive, but with early recognition and proper care, most people recover well. Mild to moderate tendinitis often responds to conservative measures, while tears may require bracing or surgery plus rehabilitation.

Not sure what's causing your symptoms or whether you need professional care? Use Ubie's free symptom checker to answer a few quick questions and receive personalized guidance on your next steps. If your symptoms are severe, sudden, or not improving, please speak to a doctor—early evaluation helps prevent complications and get you back on your feet safely.