Peroneal Neuromodulation vs Pelvic Floor Exercises in OAB

Inclusion Criteria: * Adults aged 18 years or older. * Diagnosis of idiopathic overactive bladder (OAB) based on clinical evaluation. * Presence of urinary urgency, with or without urgency urinary incontinence, usually accompanied by increased urinary frequency and/or nocturia. * OAB symptoms present for at least 3 months. * Ability to complete bladder diaries and symptom questionnaires. * Willingness to participate in the study and provide written informed consent. * Ability to comply with the assigned treatment protocol and scheduled follow-up visits. Exclusion Criteria: * Neurogenic lower urinary tract dysfunction or a known neurological disease affecting bladder function. * Active urinary tract infection at the time of enrollment. * Significant pelvic organ prolapse. * Predominant stress urinary incontinence or mixed urinary incontinence with predominant stress symptoms. * Clinically significant bladder outlet obstruction or urinary retention. * History of major pelvic surgery or pelvic radiotherapy that may affect lower urinary tract function. * Previous treatment with botulinum toxin injection or neuromodulation within the predefined washout period. * Current use of OAB medications that cannot be discontinued or appropriately washed out before enrollment. * Pregnancy. * Presence of a cardiac pacemaker, implanted defibrillator, or another implanted electrical device incompatible with electrical stimulation. * Any condition that, in the investigator's judgment, would prevent safe participation or adherence to the study protocol.