Painful Sole of Foot Anatomy
To better understand plantar fasciitis, it helps to understand the anatomy of the foot.
The plantar fascia is a very strong, thick band under the skin on the bottom of the foot. It is attached to the heel bone and fans forward, attaching to the bases of the toes.
This structure acts as a bowstring to support the arch, which is formed by the bones in the foot.
- Cunnane G, Brophy DP, Gibney RG, FitzGerald O. Diagnosis and treatment of heel pain in chronic inflammatory arthritis using ultrasound. Semin Arthritis Rheum. 1996 Jun;25(6):383-9. 
- La Porta GA, La Fata PC. Pathologic conditions of the plantar fascia. Clin Podiatr Med Surg. 2005 Jan;22(1):1-9, v. 
- Roxas M. Plantar fasciitis: diagnosis and therapeutic considerations. Altern Med Rev. 2005 Jun;10(2):83-93.