Posterior tibial tendonitis, also known as posterior tibial tendon dysfunction or simply PTTD, can lead to pain and even a flattening of the arch of your foot if left untreated. Our Ankle Supports for Posterior Tibial Tendonitis are designed to help lift the arch while supporting the ankle and relieving pain in the tibialis posterior, helping you walk with a normal gait while preventing your condition from worsening.