This document discusses abnormal vaginal discharge, including its definition, prevalence, and causes. Physiological causes of discharge include various life stages from neonatal to post-menopausal. Pathological causes include non-infective conditions like chemical irritation or foreign bodies, as well as infective conditions like bacterial vaginosis, candidiasis, or trichomoniasis. The document outlines the vaginal microflora and factors influencing the vaginal ecosystem.