If left untreated, hemorrhoids cause complications that can sometimes have serious consequences, mainly in the following areas (1) Anemia. One of the most important symptoms of hemorrhoids is blood in the stool. Repeated bleeding during stool can cause the body to lose a lot of iron and cause iron deficiency anemia. This is because under normal circumstances the absorption and excretion of iron remains in balance, the loss of iron is very small, normal adult men do not lose more than 2 mg of iron per day, while patients with blood in the stool, if the daily blood loss exceeds 6 to 8 ml, the loss of iron 3 to 4 mg or more. Normal human male contains a total of 50 mg/kg body weight of iron, and female is about 35 mg/kg body weight, if long-term blood in stool, a large amount of iron is lost, so that the total amount of iron in the body is lower than normal, can cause iron deficiency anemia. (2) Necrosis. Long-term embedded hemorrhoids, hemorrhoid nuclei prolapse outside the anus, due to local edema, ischemia constantly aggravated, so that the accumulation of local metabolic products, further aggravated the local edema of the anus, so that the embedded hemorrhoids more serious, forming a vicious circle, and eventually there will be hemorrhoid mucosal erosion, hemorrhoid necrosis. There are reports from abroad that the thrombus in the hemorrhoid nucleus spreads upward, and if the necrosis extends to the rectal wall, it can cause severe sepsis in the pelvis. This is a rare condition, but must be given high priority. (3) Infection. Infection of varying degrees can occur after an embedded hemorrhoid. The patient has symptoms such as urgency, anal swelling, etc. At this time, the infection is mostly confined to the anal part, and if improperly treated and forcefully reset, it will easily cause the infection to spread and submucosal and perianal multi-gap abscesses. If the dislodged bacterial embolus travels up the vein, coupled with improper use of antibiotics or no antibiotics, portal vein bacteremia or even sepsis can form, and liver abscess can also be formed. Fatal portal vein sepsis associated with embedded hemorrhoids has been reported abroad. In conclusion, hemorrhoids have many harmful effects on the human body and should be taken seriously by clinical workers, but patients with hemorrhoids do not have to be overly nervous, as long as they are treated early and in a timely manner, they can avoid the occurrence of these serious complications.