Hemorrhoids, or piles, are swollen veins in the rectum or anus, often caused by straining during bowel movements, pregnancy, or obesity. Symptoms include pain, itching, and bleeding during bowel movements. Treatment options include dietary changes, over-the-counter creams, and medical procedures like rubber band ligation or surgery for severe cases. Prevention involves maintaining a high-fiber diet, staying hydrated, and avoiding prolonged sitting or straining. Early intervention and lifestyle modifications can alleviate symptoms and prevent recurrence.