Your arch shouldn’t collapse as you age. Posterior tibial tendon dysfunction—also known as adult acquired flatfoot—is a progressive condition that starts with inner ankle pain and ends with rigid deformity if untreated. This guide breaks down who’s at risk, how to recognize it early, the science behind braces and orthotics, and the latest surgery options from tendon reinforcement to fusion.

What if Bigfoot booked a podiatry visit? A playful, evidence-based look at flat feet, plantar fasciitis, and fungal nails with real treatment tips.