BACKGROUND AND OBJECTIVE: Management of young men with primary bladder neck obstruction (PBNO) and dysfunctional voiding (DV) is challenging. We systematically reviewed evidence on diagnostic strategies and treatment outcomes in men aged 18-50 yr with PBNO or DV. METHODS: We conducted a comprehensive bibliographic search on the Embase, Medline, and Cochrane Library databases in July 2024. KEY FINDINGS AND LIMITATIONS: Twenty-five publications were identified. Videourodynamics represents the standard diagnostic approach. Standard therapies for PBNO include alpha-blockers (ABs) as the first-line approach and bladder neck incision (BNI) in patients failing medical therapy. Pooled estimates of total International Prostate Symptom Score (IPSS) and maximum urinary flow rate (Q CONCLUSIONS AND CLINICAL IMPLICATIONS: Diagnosis of PBNO/DV in young men requires the integration of anatomical and functional data. ABs represent the first-line approach for PBNO followed by BNI in cases of failure. Behavioral modification plus biofeedback represents the only strategy tested for DV. Given the low quality of evidence, a shared decision-making approach for diagnosis and treatment is required.