The good location of internal hemorrhoids is mainly at the location of 3, 7 and 11 points of the truncated position, because these 3 locations have arteries with suprahemorrhoidal arteries, which are more vascular and richer in blood supply. The microvessels are easy to varicose. Bad habits such as spicy and stimulating diets lead to microvascular dilatation; squatting toilets for longer periods of time with greater pressure; women in pregnancy compress the rectum, leading to poor venous reflux in the rectum, making it easy for hemorrhoids to occur in 3 locations. The superior hemorrhoidal vein eventually converges in the portal vein, which has no valve, and the vertical pressure of the blood vessels is relatively high, making it easy to form hemorrhoids in these 3 locations, so they are also called the 3, 7, and 11 o’clock locations for the mother hemorrhoid area.