Nabhi poorana (navel filling therapy): classical references, methodology, and evidence-based appraisal of an ayurvedic therapeutic technique

Objective: To provide a comprehensive evidence-based appraisal of Nabhi Poorana (navel filling therapy), a classical Ayurvedic therapeutic technique involving application of medicated oils to the umbilical region, examining its classical references, methodology, physiological basis, and contemporary scientific evidence. Background: Nabhi Poorana is documented in classical Ayurvedic texts (Charaka Samhita, Sushruta Samhita, Astanga Hridaya) as a therapeutic intervention for various conditions. The umbilical region (Nabhi) is described as the "Yakrit Srotasa Mula" (root of the hepatic channel) with profound physiological significance. Contemporary anatomy has confirmed direct vascular and lymphatic connections from the umbilical region to the portal circulation via the para-umbilical veins of Sappey, suggesting mechanism-based rationale for this ancient practice. Methods: A comprehensive literature review was conducted examining: (1) Classical Ayurvedic texts (Charaka Samhita, Sushruta Samhita, Astanga Hridaya) and their descriptions of Nabhi Poorana methodology; (2) Peer-reviewed publications on umbilical transdermal delivery and pharmacokinetics; (3) Evidence for anatomical and physiological basis; (4) Contemporary clinical and pre-clinical studies on Nabhi-applied formulations. Key Findings: Classical texts describe Nabhi Poorana methodology with specific oils, durations, and indications including: digestive disorders, musculoskeletal pain, reproductive health, and metabolic conditions. Modern pharmacokinetic studies demonstrate that umbilical application achieves selective hepatic portal delivery via para-umbilical veins, preferential uptake via lymphatic pathways, and enhanced transdermal penetration compared to other body sites. Published clinical evidence documents efficacy in pain management (VAS reduction 60-75%), digestive disorders (symptom improvement 65-80%), and menstrual disorders (cycle regularization 58-72%). Safety profiles are favorable with minimal adverse effects reported. Conclusions: Nabhi Poorana represents a rationally designed therapeutic technique with mechanistic basis in both classical Ayurvedic physiology and contemporary vascular anatomy. The published evidence supports efficacy for specific conditions (musculoskeletal pain, digestive disorders, reproductive health), warranting further controlled clinical trials. This review bridges classical Ayurvedic knowledge with contemporary pharmacokinetic and clinical evidence, demonstrating that ancient therapeutic observations can be explained and validated through modern scientific methods.