Hemorrhoids are divided into four stages: In the first stage, the main manifestation of internal hemorrhoids is anal bleeding during stool, with more blood, bright red, sometimes dripping, sometimes spraying, generally painless, with a certain periodicity. If the bleeding is repeated for a long time, it can lead to hemorrhagic anemia, making the patient feel dizzy, short of breath, fatigue and weakness; or even fainting (the bleeding can be treated conservatively with medicine at the beginning, but if the bleeding is repeated, it must be treated surgically). In the second stage, in addition to bleeding, the internal hemorrhoid also has the nucleus of the hemorrhoid prolapsing out of the anus during stool, which can be reset by itself after stool. In the third stage, the nucleus of the internal hemorrhoid can not return to its original position by itself, and needs to be pushed back by hand. In severe cases, coughing and walking can also cause the hemorrhoid nucleus to prolapse out of the anus when the abdominal pressure increases. In the fourth stage, internal hemorrhoids have different degrees of pain if the nucleus cannot be returned by hand after prolapsing, and edema, infection and necrosis occur. External hemorrhoids will feel severe pain when they become inflamed or form a blood clot.