What causes foot pain in the heel when bending down or pulling the toes back?

Plantar fasciitis: Is the most likely cause, often caused by excessive tension on plantar fasciia and achilles tendon.

Many possibilities: Your pain could be as a result of many different things. A thorough history and physical exam and possibly some laboratory and radiology exams are needed to determine the exact cause. Causes of pain may include: trauma (fracture, sprain, arthritis), infection, metabolic conditions (gout), musculoskeletal or biomechanical abnormality and neurologic conditions (neuropathy).