Endoscopic plantar fasciotomy (EPF) is one of the surgeries used to treat chronic strain of the plantar fascia. If this ligament-like band that runs along the bottom of your foot is inflamed, you're likely to have pain on the inside of your foot, where the arch and heel meet. EPF is an outpatient procedure. It takes about an hour to perform. It may be done at a hospital, a same-day surgical facility, or in your doctor's office.