Hemorrhoids are swollen veins in the lower part of the rectum and anus. They can cause discomfort, itching, and bleeding during bowel movements. Hemorrhoids can be either internal, located inside the rectum, or external, found under the skin around the anus. They are often caused by factors like straining during bowel movements, pregnancy, or sitting for long periods. Many people experience hemorrhoids at some point in their lives, and while they can be painful, they are usually not serious. Treatment options include over-the-counter creams, warm baths, and lifestyle changes like increasing fiber intake. In severe cases, medical procedures may be necessary.