Effectiveness of Non-Pharmacological Interventions in Patients with Facial Paralysis: An Umbrella and Mapping Review

Background and Objectives: Facial paralysis involves the complete or partial loss of facial movement due to damage to the facial nerve, leading to impaired voluntary muscle function and facial asymmetry. Given its significant physical and psychosocial impact, there is an urgent need to strengthen the evidence supporting non-pharmacological treatments. This umbrella review aims to compile the most reliable and current data to establish a consensus on the effectiveness of such interventions for patients with facial paralysis. Materials and Methods: This study is an umbrella review. A systematic search was conducted in PubMed, Embase, Scopus, and CINAHL (28 July 2024). The variables assessed included overall healing/recovery rate, facial disability, and facial function. Methodological quality was evaluated using the AMSTAR and ROBIS tools. Screening was performed independently by two reviewers, with a third reviewer resolving any discrepancies. Results: Five systematic reviews were included, all evaluating the impact of non-pharmacological interventions in facial paralysis. The findings suggest that acupuncture and electrical stimulation may improve recovery rates and facial function, although high heterogeneity and methodological limitations were noted in some studies. No definitive conclusions could be drawn regarding facial disability. Conclusions: The combination of electrotherapy with other complementary techniques, such as facial exercises or laser therapy, appears to be a safe and potentially effective approach for facial paralysis rehabilitation. Nonetheless, further research employing standardized protocols and higher methodological quality is necessary to establish more robust conclusions for physiotherapeutic practice.