Plantar Fasciitis
That excruciating pain can be at the center, inside, or outer side of your heel. Both heel spurs (little calcium deposits), or an inflammation of the plantar fascia, that fibrous tissue that connects the heel bone to the toes are possible reasons.
Electroacupuncture is a great way to release Qi & Blood Stagnation that causes this sharp pain. The ideal treatment will start from the calf, as it holds a lot of tension and pulls the heel upwards via the Achilles tendon, and work your way down to the heel.