Generally, adult-acquired flat-foot occurs only in one foot, but can be seen in both. This ailment is generally progressive, so if left untreated, the symptoms will continue to get worse. Symptoms generally occur after an activity that requires the use of the tendon such as running, walking, hiking or climbing stairs.
Symptoms of PTTD will change as the condition worsens, but initially include:
- Flattening of the arch
- An inward roll of the ankle
When PTTD initially develops, it begins with a pain on the inside of the foot and ankle. The area may be red, warm, and swollen, as well. As the arch begins to flatten, there may still be pain on the inside of the foot and ankle, however, the foot and toes begin to turn outward and the ankle rolls inward. As it reaches its advanced stages, the arch continues to flatten and the pain often shifts to the outside of the foot, below the ankle. This indicates that the tendon has deteriorated considerably and arthritis is likely developing in the foot.