Inclusion Criteria:  Scheduled for FESS Possessing an American Society of Anesthesiologists physical status classification of I or II Age ≥ 18 Possess the capacity to give informed consent Able to read write and understand English Able to attend follow up visits at postop days 7 and 14 Postop pain VAS ≥ 5 in PACU phase II  Exclusion Criteria:  Does not meet inclusion criteria History of chronic pain Experiencing chronic pain requiring opioids at baseline and/or who are under the care of pain management specialists Seizure disorders Undergoing planned or unplanned additional procedures at the time of FESS In custody of the state Prisoners Known to be pregnant Implanted cranial metallic components or devices including deep brain stimulators or cochlear implants Has an implanted or external worn cardiac device including pacemakers, automated implantable cardioverter defibrillator (AICD), or any other cardiac electric devices (including non-implanted devices, e.g. defibrillator vest)