This document discusses depression among medical students. It reports that the prevalence of depression among medical students is around 27% based on a systematic review, and even higher at 48% in one Indian study. Common symptoms of depression include depressed mood, loss of interest, changes in appetite, sleep problems, low energy, poor concentration, and feelings of guilt or low self-worth. The document outlines diagnostic criteria, types of depression, causes and management strategies like lifestyle changes, counseling, medication, and coping skills.