Charak Samhita
सन्धारणादत्यशनादजीर्णाध्यशनात्तथा। वर्चोवाहीनि दुष्यन्ति दुर्बलाग्नेः कृशस्य च ॥२१॥
Purishavaha srotas are afflicted due to suppression of urge of defecation, over eating, eating during indigestion, especially in persons with poor digestion and who are emaciated.
english translation