Medial midfoot heel pain, specially with extended excess weight bearing, could possibly be because of tarsal tunnel syndrome, that's caused by compression on the posterior tibial nerve. Sinus tarsi syndrome manifests as lateral midfoot heel pain and a feeling of instability, notably with improved action or strolling on uneven surfaces. https://www.theorthopaedicandpainpractice.com/a-comprehensive-guide-to-treating-foot-heel-pain/