👉 In medical terminology, a hemorrhoid is a type of blood clot that forms in the rectum (the internal organ where the stool and other mucus pass from the anus). Hemorrhoids can be caused by various factors such as straining during bowel movements, frequent constipation, or increased pressure on the肛管(located at the base of your rectum) due to weight gain, obesity, diabetes, or certain medications. They are typically not painful and typically go away on their own with