Many of the patients that we have seen recently, state their medical history with a direct diagnosis for themselves, hemorrhoids. In fact, the symptoms of these patients are not uniform, some are prolapse of anal swelling during stool, combined with blood in the stool, some are pain in the anus during stool, itching in the anus, and some are even left standing with anal discomfort. But all of them are blamed on hemorrhoids. There are many types of anorectal diseases and many clinical manifestations of the disease. The proverbial nine out of ten hemorrhoids refers to anal diseases, not all of which are caused by hemorrhoids. The following is a brief introduction to the types of anal diseases and their clinical manifestations. Thrombosed external hemorrhoids are the most common type of external hemorrhoids. It is often caused by excessive force during defecation, strenuous activity or coughing that ruptures the veins at the anal verge, and the blood leaks out into the connective tissue and becomes a blood clot, creating a round or oval lump under the skin of the anus, varying in size, located inside the anal canal or outside the anal verge. The lump is soft at first and becomes hard after a few days. Ninety-nine percent of patients with anal fissures have pain at the anus, and the pain is regular, mainly during defecation, slightly relieved after defecation, and then pain again, which is usually intense. Second, bleeding at the anus after defecation. Bleeding after defecation is mainly caused by excessive tension at the anal opening, and the amount of bleeding is usually small and usually does not mix with stool. The main symptom is that a small amount of pus repeatedly flows from the external mouth, polluting the underwear; sometimes the pus stimulates the perianal skin and makes it itchy, if the external mouth is temporarily closed, the pus accumulates, the local area is red and swollen, there is swelling and pain, the closed external mouth can be pierced again, or another new external mouth is formed by piercing in the vicinity, and so on repeatedly. If the fistula drains smoothly, there is no local pain and only slight swelling and discomfort, which the patient often does not mind.