Posterior tibial tendonitis responds well to conservative treatment in most cases, with roughly 90% of patients reporting decreased pain and improved function without surgery. The key is catching it early and giving the tendon enough time to heal before the condition progresses to structural changes in your foot. Treatment ranges from simple rest and ice in mild cases to bracing, physical therapy, and occasionally surgery when the tendon has deteriorated significantly.
What the Posterior Tibial Tendon Does
The posterior tibial tendon runs along the inside of your ankle and attaches to bones in the middle of your foot. Its main job is supporting your arch and helping your foot push off the ground when you walk or run. When this tendon becomes inflamed or starts to degenerate, you’ll typically feel pain and swelling along the inner ankle, and over time your arch can flatten. The condition is progressive: what starts as simple tendon irritation can eventually lead to a rigid flatfoot deformity if left untreated.
Early-Stage Treatment at Home
If you’re in the early stages, with pain along the inner ankle but no visible change in your arch, conservative measures are your starting point. Rest is the most important step. That means cutting back on activities that load the tendon, particularly running, hiking, and prolonged walking. Ice the area for 15 to 20 minutes several times a day, and over-the-counter anti-inflammatory medications can help manage pain and swelling.
In more severe flare-ups, a walking boot or short leg cast for a few weeks can immobilize the tendon enough to let inflammation settle down. This is especially useful if you’ve been pushing through pain and the tendon hasn’t had a real chance to calm down. Once the acute pain eases, you transition into supportive footwear and begin rebuilding strength gradually.
Orthotics and Bracing
Arch support is one of the most effective long-term strategies for managing this condition. The goal is to reduce the mechanical stress on the tendon by supporting the arch it’s supposed to hold up. For mild cases, over-the-counter insoles with firm arch support and a deep heel cup can make a noticeable difference, especially if you have flat feet or tend to overpronate (roll your foot inward when you walk).
Custom orthotics, molded to your foot, offer more targeted correction and are generally recommended when off-the-shelf insoles aren’t enough. One study found that nearly 70% of patients with posterior tibial tendon dysfunction who wore a custom-designed ankle-foot orthosis were able to avoid surgery entirely. For moderate cases, a UCBL orthotic (a rigid, high-walled insert that cups the heel and supports the arch aggressively) or an Arizona brace (a leather lace-up that stabilizes the ankle and midfoot together) can provide the extra control needed to keep the foot in proper alignment during daily activities.
Picking the right option depends on how far the condition has progressed. If your arch is still intact and the pain is mostly inflammatory, a supportive insole may be enough. If your arch is starting to flatten or your heel tilts outward when you stand, you likely need something more structured.
Physical Therapy and Exercises
Physical therapy is a cornerstone of treatment at every stage. A typical program focuses on three goals: reducing inflammation, strengthening the tendon and surrounding muscles, and improving the mechanics of how your foot and ankle move together.
Early exercises are gentle. Towel scrunches (gripping a towel with your toes), calf raises, and resistance band work to strengthen the muscles that support your arch are common starting points. As your pain decreases, therapy progresses to single-leg balance exercises, eccentric calf lowering (slowly lowering your heel off a step), and eventually sport-specific movements if you’re trying to return to running or other high-impact activity. Stretching the calf and Achilles tendon is also important because tightness in the back of your lower leg increases the load on the posterior tibial tendon.
Most people need several months of consistent therapy to see lasting improvement. Expect noticeable pain relief within the first four to six weeks, but a full return to high-impact activity typically takes three to six months depending on severity.
Shockwave Therapy
Extracorporeal shockwave therapy (ESWT) is a non-invasive option that uses focused pressure waves to stimulate healing in damaged tendons. It’s typically considered when standard conservative treatment hasn’t produced enough improvement after several months. One randomized controlled trial found good or excellent results in 90% of patients treated with shockwave therapy at two to three years of follow-up, compared to 50% in the group that received conventional conservative care alone. Another study reported satisfactory outcomes in about 76% of patients after a single session of low-energy shockwave treatment, versus just 17% with other non-surgical therapies.
The treatment is delivered in an outpatient setting, usually over one to three sessions. It can be uncomfortable during the procedure but doesn’t require anesthesia or downtime. While not yet standard first-line therapy everywhere, the evidence suggests it’s a reasonable option before considering surgery.
What to Avoid: Steroid Injections
Corticosteroid injections are sometimes used for tendon pain elsewhere in the body, but they carry real risk when it comes to the posterior tibial tendon. Steroid injections can weaken tendon tissue and increase the chance of rupture, which is a rare but serious complication. A tendon that’s already inflamed and degenerating is especially vulnerable. For this reason, most specialists avoid injecting steroids directly into or around this tendon. If you’re offered a cortisone shot for posterior tibial tendonitis, it’s worth asking about the rupture risk and whether other options have been fully explored.
When Surgery Becomes Necessary
Surgery is reserved for cases where conservative treatment has failed or the tendon has deteriorated to the point where the foot’s structure has changed. The specific procedure depends on how much damage has occurred.
In the earliest surgical stage, when the tendon is inflamed but the foot hasn’t deformed yet, a procedure to clean out the inflamed tissue surrounding the tendon (called a tenosynovectomy) can prevent further breakdown. This is the least invasive surgical option and aims to preserve the existing tendon.
When the tendon is significantly damaged but the foot is still flexible, surgeons often transfer a nearby tendon to take over the posterior tibial tendon’s job. The most common choice is a tendon from beneath the toes, which is rerouted and anchored to the bone where the posterior tibial tendon attaches. This transfer is usually combined with a bone-cutting procedure on the heel to realign the foot. By shifting the heel bone inward, the surgeon restores more normal foot mechanics and takes stress off the replacement tendon.
In cases where the flatfoot deformity has become rigid and the joints are arthritic, a fusion surgery that locks the affected joints into a corrected position may be the only option. This sacrifices some foot motion but eliminates the pain source and creates a stable, functional foot.
Recovery from posterior tibial tendon surgery is significant. Expect six to eight weeks in a cast or boot with limited or no weight-bearing, followed by months of physical therapy. A full return to normal activity can take six months to a year.
Preventing Recurrence
Once posterior tibial tendonitis has flared, the tendon is more vulnerable going forward. Wearing supportive shoes with good arch support, particularly during exercise or long periods on your feet, is the single most important preventive step. If you’ve been prescribed orthotics, wearing them consistently matters more than wearing them occasionally. Maintaining calf flexibility through regular stretching and keeping the muscles around your ankle strong reduces the load on the tendon over time. If you feel soreness returning along the inner ankle, scale back your activity immediately rather than pushing through it. Early intervention is what separates a minor setback from a months-long recovery.