Liquid bowel movements also known as diarrhea can happen to everyone from time to time. They occur when you pass liquid instead of formed stool. Liquid bowel movements are usually caused by a short-term illness, such as food poisoning or a virus. If your liquid bowel movements are a side effect of a chronic condition, a doctor can usually help you treat them.
If you buy something through a link on this page, we may earn a small commission. How this works. Hemorrhoids are swollen veins in your lower rectum and anus. They often result from pressure placed on the veins when you strain during bowel movements. Hemorrhoids are a very common condition.