taVNS for FRNS in Children

Inclusion Criteria: * FRNS * Age 3-17 years * Glomerular filtration rate (eGFR) ≥30 ml/min/1.73 m2 * Minimal change disease (MCD) or focal segmental glomerulosclerosis (FSGS) diagnosis (clinical diagnosis or per biopsy) * Steroid sensitive nephrotic syndrome (prior history of remission within 4 weeks of steroid therapy) * In remission at time of enrollment (remission defined as UPC \<0.2 or negative dipstick for 3 consecutive days) * Informed consent from the parent or guardian and assent from a minor of ≥ 7. years Exclusion Criteria: * Secondary forms of nephrotic syndrome * SRNS * Steroid dependent nephrotic syndrome (relapse within 14 days of stopping steroids or relapse while on steroids) * Exposure to steroids within 14 days of enrollment * Receiving any standing immunosuppression (previous exposure \> 2 months allowed and/or B cell repletion) * Any known inflammatory condition (e.g. systemic lupus erythematosis) * History of cardiac disease (arrhythmias, structural/functional abnormalities) * Implantable electronic devices * Pregnancy * Participants/guardians or participants who, in the opinion of the Investigator, may be non-compliant with study schedules or procedures