Inclusion Criteria:  Age 18-40 Within 2-weeks s/p acute grade 1 or 2 ankle inversion sprain  Exclusion Criteria:  Self-Reported Pregnancy Being treated for and on medication for a mental health diagnosis Concussion or non-lateral ankle sprain lower extremity injuries within the past 6 months Open wound or dermatologic lesion on the head or region of application Active implantable medical devices such as cochlear implants or cardiac pacemakers, or with metal implants in the head (excluding standard orthodontic braces, fillings, etc.). Epilepsy or history of seizures Participants who are not fluent in English