Achilles Tendinitis
Achilles tendinitis is the irritation and breakdown of the tendon connecting your calf muscles to your heel bone, causing stiffness and pain at the back of the heel that’s often worst first thing in the morning or after activity.
At Emerald Hill Podiatry, we assess exactly where along the tendon the strain is occurring and why, then build a treatment plan that lets the tendon heal properly rather than just settling the flare-up.
Understanding the Achilles Tendon and Its Strain
The Achilles tendon connects your calf muscles to your heel bone and is the strongest tendon in the body, but also one of the most heavily loaded, absorbing several times your body weight with every push-off.
Tendinitis develops when it’s placed under more repetitive strain than it can recover from, causing small-scale tissue breakdown, inflammation, and thickening.
It typically shows up as either non-insertional (affecting the mid-portion, a few centimetres above the heel) or insertional (where the tendon attaches to the heel bone), and the two respond differently to treatment, which is why identifying the type matters.
Left unaddressed, a manageable ache can progress to a more chronic, degenerative condition (tendinosis) that takes considerably longer to resolve.
Why the Back of Your Heel Feels Stiff and Painful
The stiffness and pain associated with Achilles tendinitis come from a combination of factors:
- Micro-tearing and inflammation within the tendon fibres from repetitive overload
- Reduced blood supply, particularly in the mid-portion, which slows repair and lets small injuries accumulate
- Tight calf muscles, increasing tension through the tendon, especially with the first steps of the day
- Degenerative changes in longstanding cases, where the tendon thickens and loses normal fibre alignment
This is why the pain pattern is so distinctive. It’s stiff and achy in the morning, easing with movement, then returning or worsening after activity.
Who Are Most at Risk
- Runners and athletes with recently increased training volume or intensity
- Middle-aged adults, as tendon elasticity and blood supply decline with age
- Tight calf muscles or limited ankle mobility
- Returning to activity after a period of inactivity
- Flat feet or overpronation
- Unsupportive footwear during high-impact activity
- Certain inflammatory conditions or medications known to affect tendon health
When Pain Shouldn't Be Ignored
Pain or stiffness persists for more than a week or two
The area feels thickened, swollen, or warm
Pain is present at rest or first thing in the morning, not just during activity
Symptoms are gradually worsening despite reduced activity
A sudden, sharp pain or "pop" at the back of the ankle — this can indicate a tendon rupture and needs urgent attention
Get to the Root of Your Achilles Pain
How We Help Your Achilles Back on Its Feet
Achilles tendinitis responds best to a staged approach: reduce the load overwhelming the tendon, let inflamed tissue settle, then rebuild capacity so it can handle normal activity without pain returning.
Options include:
- Shockwave Therapy (ESWT) — acoustic waves that stimulate blood flow and repair, especially useful once the tendon has moved into more chronic, degenerative changes
- EMTT — pulsed electromagnetic fields for deeper regeneration, often combined with ESWT for longstanding or insertional cases
- Custom Orthotics — corrects the load path where foot mechanics like overpronation are altering the angle of pull through the tendon
- Biomechanical Gait Assessment — identifies compensations or mechanical patterns driving the strain, informing footwear, orthotics, and a safe return to activity
What to Expect at Your Assessment
Your podiatrist reviews your pain history, activity, and footwear, examines the tendon for tenderness, thickening, and calf flexibility, and observes your gait to identify mechanical contributors. Imaging such as ultrasound or MRI may be used for more complex cases, though most are diagnosed clinically.
From there, you’ll be walked through whether your case is insertional or non-insertional and the right treatment mix, with your plan adjusted as the tendon’s capacity improves.
