Hemorrhoids can be divided into internal, external and mixed hemorrhoids depending on where they occur. There is a serrated line that divides the rectal mucosa and skin about 3 to 4 cm from the edge of the anus, called the dentate line. If the hemorrhoid occurs above the dentate line and at the lower end of the rectum, it is called an internal hemorrhoid; if it occurs below the dentate line around the anal canal and the edge of the anus, it is called an external hemorrhoid; if it crosses the dentate line at the same place, it is called a mixed hemorrhoid. Internal hemorrhoids can be divided into four stages: Stage 1: blood in the stool, no prolapse, nodular elevation of the mucosa on the dentate line. Stage II: Blood in the bowel movement, dripping or shooting blood, internal hemorrhoids prolapse and can be retracted on their own. Stage III: Internal hemorrhoid prolapse occurs during defecation or when coughing, exertion or weight-bearing causes increased abdominal pressure. Stage IV: The nucleus of the hemorrhoid is prolapsed outside the anus and cannot be retracted inside the anus, also known as embedded hemorrhoid, which is an emergency and needs to be treated with early surgery, otherwise it will cause infection, necrosis and bleeding. External hemorrhoids can be divided into connective tissue external hemorrhoids, thrombotic external hemorrhoids, inflammatory external hemorrhoids, etc. depending on their nature. The main manifestation of hemorrhoids is blood in the stool. If the blood in the stool is bright red, drips during defecation or stains the hand paper at the end of defecation, or bleeds in the form of jets, then it is basically identified as bleeding hemorrhoids. If the hemorrhoid develops further, in addition to bleeding, a soft swelling (hemorrhoid nucleus) will come out of the anus during stool, and this swelling can return to its original position after stool. If the swelling cannot return to its original position by itself and needs to be pushed back by hand after a bowel movement, or if it can come out even when coughing or walking, or if it cannot be returned with severe pain, then it is very serious.