Most people don’t notice the posterior tibial tendon until it starts screaming at them. One day you’re walking fine. Next day there’s a dull ache on the inside of your ankle that just won’t quit That's the part that actually makes a difference..
Here’s the thing — that little tendon does a lot more than people give it credit for. And when it’s angry, your whole stride changes It's one of those things that adds up..
If you’re dealing with posterior tibial tendonitis, you’re not alone. It’s one of the most common causes of inner-ankle pain I see talked about in running forums, mom groups, and rehab clinics alike Worth keeping that in mind..
What Is Posterior Tibial Tendonitis
So what are we actually dealing with? The posterior tibial tendon runs from a muscle in your calf, down behind the bump on the inside of your ankle, and attaches to several bones in the middle of your foot. Its main job is to hold up your arch and help turn your foot inward when you walk.
When that tendon gets overloaded, irritated, or starts to degenerate, you’ve got posterior tibial tendonitis. Sometimes it’s called PTTD — posterior tibial tendon dysfunction — once it’s been ignored long enough to actually change your foot shape. But early on, it’s just inflammation and irritation.
The tendon most people have never heard of
Look, we all know about Achilles tendons. Everyone’s heard of those. But the posterior tibial tendon? Which means it’s the quiet workhorse. It doesn’t get credit until it fails. And turns out, it fails more often than you’d think — especially in people who overpronate, stand a lot, or ramp up activity too fast.
Not the same as a sprain
A lot of folks confuse this with a simple ankle sprain. So it isn’t. In practice, a sprain is usually a sudden twist. Tendonitis builds slowly. The pain shows up on the inner side, not the outside where sprains happen. And it tends to feel worse after activity, not just during Worth knowing..
Why It Matters / Why People Care
Why does this matter? Because most people skip it. They tape it, ice it, and hope it goes away. And sometimes it does — for a week. Then it comes back louder Worth keeping that in mind..
Left alone, posterior tibial tendonitis can flatten your arch. I know it sounds dramatic, but I’ve read enough rehab case studies and talked to enough physical therapists to know it’s real. Your actual foot structure can change. And not metaphorically. Once the tendon stretches out and stops doing its job, the arch drops, the foot rolls in, and suddenly your knee and hip start compensating.
That’s the cascade. Ankle pain becomes knee pain becomes “why does my lower back hurt now?Now, ” Real talk — the foot is the foundation. Mess with the foundation and the whole house complains That's the whole idea..
And here’s what most guides get wrong: they treat this like a minor annoyance. It isn’t. It’s a warning light. Ignore it and you might be looking at a year of rehab instead of a month That's the part that actually makes a difference..
How It Works (or How to Do It)
Fixing posterior tibial tendonitis isn’t about one magic stretch. It’s a layered process. In practice, you calm it down, then build it back up. Here’s the breakdown Which is the point..
Step one: stop the stupid stuff
First, look at what you’re doing that loads the tendon. Long walks in flat shoes? Running on tired legs? Standing on concrete for eight hours? That’s fuel on the fire Worth knowing..
You don’t have to stop moving entirely. But you do need to cut the volume and intensity for a bit. The short version is: if it hurts for more than an hour after you do it, you did too much.
Step two: reduce the irritation
Ice the inner ankle for 10–15 minutes after any activity that bugs it. Some people like contrast baths. I’ve found a simple ice pack works fine.
Anti-inflammatories can help short-term, but don’t lean on them for months. On top of that, they mask the signal. And the signal is useful. It’s telling you the tendon is still mad Worth keeping that in mind..
A good arch-supportive shoe or even a basic orthotic takes pressure off the tendon. This isn’t forever. It’s a crutch while the tissue heals.
Step three: gentle mobility, not aggressive stretching
People hear “tendon” and think “stretch it.” Bad idea early on. But the posterior tibial tendon doesn’t want to be yanked. It wants controlled movement Still holds up..
Try gentle calf raises — but only the painless range. Here's the thing — or alphabet tracing with your foot in the air. That keeps the joint moving without overloading the sore spot.
Step four: rebuild the strength
Here’s where the real fix lives. Once the sharp pain is gone, you strengthen the muscle that pulls on that tendon The details matter here..
Single-leg balance work is huge. Then try closing your eyes. Worth adding: then progress to a soft surface. Sounds silly. Consider this: stand on one foot while brushing your teeth. Works though.
Heel raises with a towel under the arch to support it can wake the tendon back up. Start with both legs, move to one. Slow and controlled beats fast and sloppy every time.
Step five: fix the root cause
Why did it happen? Day to day, flat feet? Old shoes with zero support? Worth adding: weak hips? You’ve got to answer that or it’ll return.
I’ve seen people do three months of rehab and then go right back to thin-soled fashion sneakers. On top of that, two weeks later — boom, same pain. The tendon didn’t forget.
Common Mistakes / What Most People Get Wrong
Honestly, this is the part most guides get wrong. They list exercises and call it a day. But the mistakes are where people actually lose months Not complicated — just consistent..
One big one: stretching the hell out of the calf and calling it fixed. The calf might be tight, sure. But the tendon isn’t short — it’s irritated. Stretching can make it worse.
Another: rushing back. So you feel 70% better and go for a 5K. Think about it: the tendon wasn’t rebuilt yet. It was just quiet. There’s a difference between silent and strong Less friction, more output..
And the classic — wearing the wrong shoes during rehab. If your shoe folds in half like a slice of pizza, it’s not helping your arch. The posterior tibial tendon is doing extra work in those. Stop making it Still holds up..
Also, people ignore the other side. Still, your good foot. Now, if you’ve been limping, the other leg is overloaded too. Fix the pattern, not just the pain Simple, but easy to overlook..
Practical Tips / What Actually Works
Worth knowing: consistency beats intensity. Five minutes of balance work daily does more than a heroic session once a week The details matter here..
Get a real shoe. So not a “supportive” label from a fast-fashion store. Here's the thing — go to a running shop or a podiatrist if you can. Feel the arch support with your hand before you buy That's the whole idea..
Use a resistance band for inversion work — turning your foot inward against light band tension. That’s the exact motion the tendon controls. Ten reps, slow, twice a day It's one of those things that adds up..
Track your steps. Practically speaking, if 6,000 steps flares you up, stay at 5,000 until it doesn’t. Here's the thing — boring? Not to hit a goal — to stay under a ceiling. So yes. But effective? Then add 500. Very.
And sleep. Tendons repair at night. If you’re running on four hours, you’re repairing on a budget.
FAQ
How long does posterior tibial tendonitis take to heal? Mild cases can settle in 3–6 weeks with reduced load and support. More stubborn or long-standing cases often need 3–6 months of staged rehab. If your arch has started to drop, expect longer Easy to understand, harder to ignore..
Can I keep running with it? Not smart. Running loads the tendon with several times your body weight. Walk if you must, but trade the runs for biking or swimming until the pain is gone and strength returns.
Do I need an MRI? Usually not early on. A good physical exam tells most of the story. If symptoms last past two months of proper rehab, or the arch is visibly flattening, imaging helps rule out tears.
Are orthotics required forever? No. Many people use them during rehab, then wean off as their own arch and tendon get stronger. Some with structural flat feet keep a mild insert long-term. That’s fine Small thing, real impact..
**What
What if the pain moves to a different spot while I’m rehabbing? That’s not unusual. As you offload the tendon and change your gait, neighboring structures — the ankle ligaments, the plantar fascia, even the knee — may start complaining because they’re finally doing honest work again. Don’t panic and don’t abandon the plan. Note where it hurts, check that your shoes and form haven’t slipped, and if the new pain persists beyond a week or worsens with every step, get it looked at. Shifting pain is often a sign of compensation clearing, not failure Simple as that..
Is surgery ever the answer? Yes, but it’s the last door, not the first. Surgery enters the conversation when there’s a full rupture, a progressive flatfoot deformity that bracing can’t control, or when six months of disciplined rehab leaves you no better off. Most people never get there. The tendon responds well to patience and load management — it just doesn’t respond to shortcuts Surprisingly effective..
Conclusion
Posterior tibial tendonitis isn’t a mystery and it isn’t a life sentence. It’s a load problem with a clear off-ramp: calm the irritation, rebuild the strength, fix the shoes, and respect the timeline. Practically speaking, the people who recover fastest aren’t the ones who push hardest — they’re the ones who stop guessing and start listening to the tendon’s quiet feedback. Treat it like a slow rebuild, not a quick fix, and the arch that’s been letting you down will quietly start holding you up again The details matter here..
And yeah — that's actually more nuanced than it sounds.
