Posterior tibial tendonitis is a condition that results from inflammation or damage to the posterior tibial tendon, which runs along the inside of the ankle and foot. This tendon plays an important role in supporting the arch of the foot and stabilizing the ankle. Posterior tibial tendonitis is often caused by overuse, injury, or degeneration due to aging.

Symptoms of posterior tibial tendonitis include pain, swelling, and weakness in the affected foot, as well as difficulty walking or standing for extended periods of time.

Treatment options include rest, ice, and pain medication, as well as exercises to strengthen the affected tendon and surrounding muscles. In some cases, orthotics or braces may be recommended to provide additional support to the foot and ankle. If left untreated, posterior tibial tendonitis can lead to progressive flatfoot deformity and chronic pain, tendon tear or even rupture. If you suspect you have posterior tibial tendonitis, it's important to consult with a healthcare professional for an accurate diagnosis.