KEY TAKEAWAYS
- Pain at the back of the heel usually points to insertional Achilles tendonitis, a different condition from the bottom-of-heel pain caused by plantar fasciitis.
- The condition develops where the Achilles tendon attaches to the heel bone and often involves stiffness, swelling, or a bony bump that worsens with activity.
- A podiatrist can confirm the cause with an exam and imaging, then build a treatment plan specifically targeting the tendon insertion.
Not all heel pain is the same, and where it hurts matters. Pain on the bottom of the heel is usually plantar fasciitis, but pain at the back of the heel, right where the tendon meets the bone, is most often insertional Achilles tendonitis. It's a distinct condition with its own causes and its own treatment approach, and lumping it in with general heel pain can lead to the wrong plan of action.
At Marvel Foot & Ankle Centers, our experienced podiatrists can determine the cause of the pain in the back of your heel and offer the right treatment for your situation. Here’s what you should know.
What Is Insertional Achilles Tendonitis?
The Achilles tendon connects your calf muscles to your heel bone, or calcaneus, at a point called the insertion. According to the American Academy of Orthopaedic Surgeons, insertional Achilles tendonitis affects this lower portion of the tendon, where damaged fibers can calcify over time and bone spurs often form on the back of the heel. This differs from noninsertional Achilles tendonitis, which develops higher up along the tendon and is more common in younger, highly active runners.
What Causes Pain at the Back of the Heel?
Several factors can lead to irritation at the Achilles insertion, and they often overlap.
Overuse and Tight Calf Muscles
Repetitive stress from running, jumping, sports, or a sudden increase in activity places extra strain on the tendon insertion. Tight calf muscles compound the problem by increasing the pull on the tendon with every step.
Bone Spurs and Haglund's Deformity
Some patients develop a bony enlargement at the back of the heel bone, sometimes called Haglund's deformity, which can rub against the tendon and contribute to irritation and swelling in the area.
Aging and Tendon Degeneration
Tendons naturally lose some flexibility and resilience with age, which is why insertional Achilles tendonitis becomes more common in adults 40 and older, even without a specific injury.
How Is Back-of-Heel Pain Different from Bottom-of-Heel Pain?
Plantar fasciitis causes pain on the bottom of the heel that is typically sharpest with the very first steps out of bed, easing somewhat as the tissue warms up. Insertional Achilles tendonitis, by contrast, causes pain and stiffness at the back of the heel that often worsens with activity, particularly uphill walking, stair climbing, or pushing off to run. Our guide to telling plantar fasciitis, heel spurs, and Achilles tendonitis apart covers these distinctions in more detail, since it's common for patients to have more than one condition at the same time.
When Should You See a Gilbert or Chandler Podiatrist?
A few signs suggest it's time for an evaluation rather than continued self-care:
- Pain at the back of the heel that has lasted more than a few days
- A visible bump, thickening, or swelling along the tendon
- Stiffness that is worse first thing in the morning or after sitting
- Pain that limits walking, running, or wearing normal shoes
- A sudden, sharp pain or a popping sound during activity, which can indicate a partial tear and needs prompt attention
Our guide to when to see a podiatrist for Achilles tendon pain goes into more detail on timing, especially for patients who have been managing symptoms on their own for a while.
How Is Insertional Achilles Tendonitis Treated?
Treatment for pain at the Achilles insertion usually starts with conservative care: activity modification, targeted stretching, supportive footwear, and custom orthotics to reduce strain on the tendon. Because insertional cases respond differently to loading exercises than mid-tendon cases, getting the diagnosis right matters before starting a stretching program. Eccentric heel-drop exercises, for example, are a common recommendation for mid-tendon Achilles pain. Still, the same exercise can aggravate an insertional injury if it isn't modified for the location of the damage.
For pain that doesn't improve with conservative measures, options such as shockwave therapy or platelet-rich plasma injections may be considered as part of a broader treatment plan built around your Achilles tendonitis evaluation. Surgery is reserved for cases involving significant tendon degeneration or a bone spur large enough to keep conservative treatment from working, and it's typically considered only after other options have been tried. As with any chronic tendon issue, results depend on how long symptoms have been present and how the tendon responds to treatment, so your podiatrist will set expectations based on your specific case rather than a one-size-fits-all timeline.
The experienced podiatrists at Marvel Foot and Ankle Centers can evaluate your heel pain, discuss available treatment options, and answer any questions you have about your foot health.