Injection therapy: The main principle is that after the drug is injected (mostly with eliminating hemorrhoids), it produces sterile inflammation in the hemorrhoid nucleus, causing it to atrophy and harden and closing off the hemorrhoid arterial reflux. The use of injection therapy alone is very effective for stage I internal hemorrhoids: it is less effective for stage II and III prolapsed hemorrhoids and has the possibility of complicating abscesses. Laser therapy: The advantage is that it is relatively simple to perform and less painful for the patient. The disadvantages are easy bleeding during the operation, easy skin drop or stenosis after the operation, skin reshaping if necessary, and poor excision. Copper ion therapy: The advantage is that it is simple to operate; the disadvantage is that it cannot effectively remove the nucleus of the hemorrhoid. Mucosal stapling on hemorrhoids (PPH surgery): currently more popular, its essence is to retain the integrity of the anal cushion, so that the prolapsed internal hemorrhoids are suspended and pulled upward, no longer prolapsed, cut off the arterial return supply of hemorrhoids, so that the nucleus atrophy. The disadvantage is that it is prone to postoperative hemorrhage, expensive, and cannot effectively remove the hemorrhoid nucleus directly, and lacks long-term efficacy observation. Hemorrhoid ligation therapy: which is divided into simple ligation method, penetrating ligation method and segmental ligation method. The advantages are direct removal of hemorrhoid nuclei, the disadvantages are incomplete removal of hemorrhoid nuclei, easy to cause damage to normal tissues during excision, and longer postoperative pain, more pain, more bleeding; postoperative anal edge edema is more severe, and easy to cause urinary retention and anorectal stenosis. Doppler-guided hemorrhoidal artery ligation: The principle is to ligate the superior hemorrhoidal artery to block the reflux supply of hemorrhoids. The disadvantage is that it cannot remove the nucleus of the hemorrhoid, and stage II and III severe hemorrhoids are prone to recurrence. However, the current hemorrhoidal artery ligation with suspension can make up for some of the disadvantages and is more recognized by most anorectal specialists.