The reason for this is that when ligating internal hemorrhoids, the threads will stimulate the defecation reflex around the anus to produce a defecation reflex, so the hemorrhoids produce a continuous feeling of falling and incomplete stool for a period of time after surgery. This sensation is normal because it stimulates the defecation reflex, which normally stimulates the defecation reflex after a certain mass and volume of stool is produced. However, when the threads directly stimulate the defecation reflex, it will produce a continuous downward sensation. Patients should not squat for a long time after a bowel movement, even if they feel like defecating, because the sensation is stimulated by the threads, not by the bowel movement.