Ultrasound is not used to examine hemorrhoids, but is used to examine other lesions around the anus, such as localized masses, abscesses, and fistulas, which require an ultrasound probe to be placed in the rectum from the anus for ultrasound examination. The examination of hemorrhoids is very simple and is done mainly by the examining physician, including anal visualization and anal fingering. Anal visualization is the doctor’s eye observation of the area around the anus and the anal verge for any abnormal masses, the location, size and number of hemorrhoids, etc. In contrast, anal finger diagnosis is when the doctor enters the patient’s anus with his or her finger and examines the lower part of the rectum and the anal canal, including internal hemorrhoids, perianal abscesses, anal fistulas, hemorrhoids, and other diseases. In addition, patients with hemorrhoids with blood in the stool can check sigmoidoscopy, proctoscopy or colonoscopy to clarify the cause of blood in the stool.