Hemorrhoids and anal fissures
A hemorrhoid is a swollen vein. An anal fissure is a small tear. Pain through a bowel movement and a visible crack are fissure descriptions. Painless bright red bleeding is an internal-hemorrhoid description. The pages say a clinician tells them apart.
By ahem. Published October 25, 2026.
A swollen vein and a small tear
The lists below come from public pages opened on October 25, 2026. Matching a sentence does not identify which one you have. ahem does not examine people.
Mayo Clinic calls hemorrhoids swollen veins in the lower rectum. On the symptoms page dated August 23, 2025, internal hemorrhoids are usually painless and tend to bleed. External hemorrhoids may cause pain. NIDDK, last reviewed in October 2016, says external hemorrhoids may itch, form hard tender lumps near the anus, or ache, especially when sitting. Internal hemorrhoids may leave bright red blood on stool, on toilet paper, or in the toilet bowl, and they most often are not painful unless they prolapse.
Mayo Clinic's fissure page, dated December 31, 2024, calls an anal fissure a small tear in the thin, moist tissue that lines the anus. MedlinePlus, reviewed April 11, 2026, calls it a small split or tear in that lining. NIDDK's diagnosis page uses the same idea when it tells a doctor what to look for: a small tear in the anus that may cause itching, pain, or bleeding. NIDDK lists that tear separately from a prolapsed hemorrhoid and from a clot.

How the fissure pages describe the pain
On the page checked October 25, 2026, Mayo Clinic lists pain during bowel movements, pain after bowel movements that can last up to several hours, bright red blood on the stool or toilet paper, a visible crack in the skin around the anus, and a small lump or skin tag near the tear. It also says spasms can occur in the anal sphincter, the ring of muscle at the end of the anus.
MedlinePlus says a fissure may cause painful bowel movements and bleeding, with blood on the outside of the stool or on toilet paper. It says the crack is almost always in the middle, and that it can be seen when the area is stretched slightly. It says symptoms may start suddenly or develop slowly. It also says that avoiding bowel movements because of the pain makes stools harder, which can make the tear worse.
Mayo Clinic says to see a health professional for pain during bowel movements, or for blood on stools or toilet paper after a bowel movement. That is a lower bar than waiting to see if a cream works. The bleeding page has the emergency signs Mayo Clinic names for a large amount of blood.
Where the lists overlap
Both problems can involve bright red blood and anal pain. A skin tag can sit near a fissure, and NIDDK says a skin tag can also be leftover skin after a clot in an external hemorrhoid dissolves. A hard lump can be the clot Mayo Clinic describes. None of those details picks a winner from a bathroom mirror.
NIDDK says a doctor often makes the hemorrhoid diagnosis from the history and an exam, and looks for a fissure on that exam. The steps are on what a hemorrhoid exam checks. When rectal bleeding should be checked is the page for the bleeding itself, including the reasons both sources give for not treating it as a hemorrhoid by default.
Sources
- Symptoms and Causes of Hemorrhoids. National Institute of Diabetes and Digestive and Kidney Diseases. Accessed October 25, 2026. NIDDK last reviewed this page in October 2016.
- Diagnosis of Hemorrhoids. National Institute of Diabetes and Digestive and Kidney Diseases. Accessed October 25, 2026. NIDDK last reviewed this page in October 2016.
- Hemorrhoids: Symptoms and causes. Mayo Clinic. Accessed October 25, 2026. Mayo Clinic dates this page August 23, 2025.
- Anal fissure: Symptoms and causes. Mayo Clinic. Accessed October 25, 2026. Mayo Clinic dates this page December 31, 2024.
- Anal fissure. MedlinePlus. Accessed October 25, 2026. MedlinePlus lists a review date of April 11, 2026.
General information, not personal medical advice. We have not compared brands. If this disagrees with a label you already have, follow the label.
