Hemorrhoids (HEM-uh-roids), also called piles, are swollen veins in your anus and lower rectum, similar to varicose veins. Hemorrhoids can develop inside the rectum (internal hemorrhoids) or under the skin around the anus (external hemorrhoids).
Nearly three out of four adults will have hemorrhoids from time to time. Hemorrhoids have a number of causes, but often the cause is unknown.
Fortunately, effective options are available to treat hemorrhoids. Many people get relief with home treatments and lifestyle changes.
Signs and symptoms of hemorrhoids usually depend on the type of hemorrhoid.
These are under the skin around your anus. Signs and symptoms might include:
Internal hemorrhoids lie inside the rectum. You usually can't see or feel them, and they rarely cause discomfort. But straining or irritation when passing stool can cause:
If blood pools in an external hemorrhoid and forms a clot (thrombus), it can result in:
If you have bleeding during bowel movements or you have hemorrhoids that don't improve after a week of home care, talk to your doctor.
Don't assume rectal bleeding is due to hemorrhoids, especially if you have changes in bowel habits or if your stools change in color or consistency. Rectal bleeding can occur with other diseases, including colorectal cancer and anal cancer.
Seek emergency care if you have large amounts of rectal bleeding, light-headedness, dizziness or faintness.