BioWave can be really helpful to treat pain resulting from plantar fasciitis. If someone has very calloused skin on the bottom of their foot in the plantar fascia region, it is even better to use a percutaneous electrode in this region as the microneedle array bypasses the impedance of the skin and provides a direct conductive pathway into deeper tissue.
If the pain is really localized in one spot, then use E-set electrodes in either noninvasive or percutaneous sets. Please note (in both sets) the larger rectangular dispersive pad is placed over a bony prominence like the lateral malleolus (as in the photo).