Diarrhea is defined as passing 3 or more loose stools per day and is the second leading cause of death in children under 5 globally. Every year around 1.5 to 2 billion cases of diarrhea occur resulting in death, with India seeing one in five child deaths due to contaminated food/water. Diarrhea is classified based on duration, clinical presentation, and physiology, and can be caused by infections, drugs, diet, surgery, or other miscellaneous factors. Management focuses on rehydration through fluid replacement, administering prescribed drugs, maintaining nutrition, and educating mothers on prevention.