Hemorrhoids pain while having a bowel movement may be due to the fact that it is a thrombosed external or internal hemorrhoid that has prolapsed. Hemorrhoids are usually caused by improper diet, bad habits, poor bowel habits and other factors, the anal cushion moves down or varicose veins around the anus, causing the formation of hemorrhoids. Hemorrhoids are usually associated with pain, blood in stool and swelling. Hemorrhoids have pain when having a bowel movement, if it is external hemorrhoids, it may be thrombosed external hemorrhoids, rupture, secondary infection; if it is internal hemorrhoids, it is usually internal hemorrhoids prolapse embedded, infection, erosion, necrosis and so on caused. If you suffer from hemorrhoids, you should develop the habit of regular defecation, to keep the bowel movement, optional potassium permanganate warm water for sitz bath, keep the local skin clean, it is recommended to consult a doctor in time, a clear diagnosis and treatment, so as not to delay the condition.