Hemorrhoids are swollen blood vessels in and around the anus and lower rectum. They stretch under pressure and are similar to varicose veins in the legs. Hemorrhoids are either internal or external.
- Internal hemorrhoids develop inside the anus. They are painless and sometimes bleed a lot during bowel movements. They may also protrude during bowel movements. If they protrude from the anal opening and cannot be pushed back, they can cause severe pain.
- External hemorrhoids develop under the skin around the anus and can easily be felt or seen as a lump. They bleed when broken by straining, rubbing, or scratching.
Copyright © Nucleus Medical Media, Inc.
Last reviewedMay 2013by Peter Lucas, MD; Michael Woods, MD
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.