Pathya-Apathya in Kushtha: A Comprehensive Review of Classical Evidence

Kushtha represents a broad spectrum of dermatological disorders described extensively in Ayurvedic literature and is considered among the Ashta Mahagada due to its chronic, recurrent, and socially distressing nature. Ayurveda emphasizes Nidana Parivarjana as the first line of management, wherein regulation of diet (Pathya–Apathya Ahara) and lifestyle (Vihara) plays a pivotal role. The present literature review aims to critically analyze classical Ayurvedic texts—from the Vedic period to post‑Samhita compendia—regarding the concept of Pathya and Apathya in the prevention and management of Kushtha, and to correlate these principles with contemporary scientific understanding of skin diseases. References from the Atharvaveda, Charaka Samhita, Sushruta Samhita, Ashtanga Hridaya, Madhava Nidana, Bhavaprakasha, Bhaishajya Ratnavali, Chakradatta, and Yoga Ratnakara were systematically reviewed. Additionally, relevant modern Ayurvedic review articles and dermatological studies were analyzed. Classical texts unanimously advocate the consumption of light, bitter, and detoxifying food substances such as Tikta Shaka, Purana Dhanya, Mudga, Triphala, and Nimba, while discouraging heavy, sour, fermented, incompatible, and Abhishyandi foods like curd, milk, fish, jaggery, and excessive salt. Contemporary research supports these dietary principles, highlighting the role of inflammation, immune modulation, gut health, and lifestyle factors in chronic skin diseases. Discussion: Classical Ayurvedic texts consistently identify improper diet and lifestyle as key etiological factors in Kushtha, emphasizing Pathya–Apathya as an essential component of Nidana Parivarjana. The predominance of Tikta, Laghu, and Agni‑deepana foods and the avoidance of Abhishyandi, Amla, and incompatible diets are aimed at reducing Ama, pacifying Doshas, and purifying Rakta. Contemporary studies support these principles by demonstrating the role of diet, inflammation, immunity, and lifestyle in chronic dermatological conditions. Conclusion: The review concludes that strict adherence to Pathya–Apathya serves as both a preventive and therapeutic modality in Kushtha, reinforcing Ayurveda’s holistic and sustainable approach to dermatological health.