Hemorrhoids are mainly caused by improper diet, prolonged sitting or standing, anal infection and pregnancy. 1. Improper diet: excessive alcohol consumption, excessive spicy and stimulating food, irregular diet and other factors, can cause stimulation of the anus and rectum, affecting venous blood return, so that the hemorrhoidal venous plexus is congested, which can lead to hemorrhoids. 2. Sitting or standing for a long time: usually often standing or sitting for a long time, easy to cause venous reflux, resulting in slow blood flow in the pelvis and abdominal organs congestion, which can cause hemorrhoidal veins overfilled, resulting in the appearance of hemorrhoids. 3. anal infection: anal infection can lead to hemorrhoidal venous plexus infection and inflammation, resulting in the vein wall elasticity of the tissue gradually fibrosis weak, resulting in insufficient resistance, so that the veins appear to expand varicose, with the aggravation of varicose veins, easy to generate hemorrhoidal mass, causing hemorrhoids. 4. pregnancy: young women, due to pregnancy, abdominal pressure increases, making the rectal hemorrhoidal vein, lymphatic reflux obstruction, rectal anal tube mucosal congestion and edema, the formation of hemorrhoids, defecation will be blood or hemorrhoidal nucleus prolapse. In addition to the above factors, there are many other causes of hemorrhoids, please go to the regular hospital in time to avoid delay. Usually need to pay attention to the diet of light and healthy, avoid standing or sitting for a long time, pay attention to the anal part of the cleanliness and hygiene, etc., to reduce the occurrence of hemorrhoids.