Diarrhea is a common gastrointestinal disorder characterized by frequent, loose, and watery bowel movements. It can be caused by a variety of factors such as infections, food allergies, medications, or underlying medical conditions. The main symptoms of diarrhea include abdominal cramps, dehydration, and fatigue. Treatment typically involves fluid replacement, dietary changes, and sometimes medications to address the underlying cause. Chronic or severe cases of diarrhea may require medical attention to prevent complications such as dehydration and electrolyte imbalances.