Hemorrhoids are a common condition, in which the veins in the soft tissues around the anus or inside the lower rectum become swollen and inflamed.

External hemorrhoids refers to swelling under the skin around the anus. Internal hemorrhoids refers to swelling inside the anus. A prolapsing hemorrhoid occurs when an internal hemorrhoid protrudes outside the anus. Hemorrhoids usually are not a serious condition and symptoms commonly resolve within a few days.

Hemorrhoids are often associated with a low-fiber Western diet. These high fat, low-fiber diets often cause individuals to suffer from constipation. Constipation causes straining during bowel movements, and because the smaller and harder stools are, the more difficult they are to pass. Hemorrhoids can form when intra-abdominal pressure increases from straining during defecation or from lack of fecal bulk. Hemorrhoids are also common during periods of hormonal stress and pregnancy in women.

Other factors that may cause hemorrhoids include; obesity, aging, diarrhea, long periods of standing or sitting, heavy lifting, and anal intercourse.