Internal hemorrhoids: The main clinical manifestations are bleeding and prolapse, which can be complicated by thrombosis, impaction, strangulation and difficulty in defecation. According to the symptoms of internal hemorrhoid, its severity is divided into 4 degrees. Grade I has blood in the stool, dripping blood, and the bleeding can stop by itself after the stool without hemorrhoid prolapse. Grade II often has blood in the stool and the hemorrhoid prolapses during defecation, but it can be returned after defecation. Grade III may have blood in the stool, and the hemorrhoid may prolapse during defecation or prolonged standing, coughing, exertion, or weight-bearing, and needs to be retracted by hand. Grade IV may have blood in the stool, and the hemorrhoid may continue to prolapse or may easily prolapse after retraction. External hemorrhoids: The main clinical manifestations are soft tissue masses in the anus, anal discomfort, itching or foreign body sensation, and pain if thrombosis and inflammation occur. Mixed hemorrhoids: The main clinical manifestation is the presence of both internal and external hemorrhoids, and in severe cases, the ring hemorrhoids may prolapse.