📍 Posterior Tibialis Tendon Injury: What You NEED to Know! 🦶🔥 Pain on the inside of your ankle or a collapsing arch? You might be dealing with Posterior Tibial Tendon Dysfunction (PTTD) — a major cause of adult-acquired flatfoot. Let’s break it down 👣👇 🧠 What is it? PTTD happens when the posterior tibial tendon — a key player in arch support and foot control — becomes inflamed, stretched, or torn, often progressing if left untreated. 🩺 Presentation: 🔹 Pain & swelling inside the ankle 🔹