Medial midfoot heel pain, specifically with extended fat bearing, could be because of tarsal tunnel syndrome, which can be attributable to compression in the posterior tibial nerve. Sinus tarsi syndrome manifests as lateral midfoot heel pain and a sense of instability, significantly with improved action or strolling on uneven surfaces. https://www.theorthopaedicandpainpractice.com/a-comprehensive-guide-to-treating-foot-heel-pain/