Fissure, fistula, hemorrhoid — three of the most common anorectal conditions, often confused, all treated differently. Here's how they actually feel different.
About this guide
Written by the GutCareHub editorial team and reviewed against current colorectal society guidance (ASCRS, BSG, NICE) and recent peer-reviewed literature. Last reviewed: 2026-05-10. We update content as evidence evolves. About our process →
Quick comparison
| Fissure | Fistula | Hemorrhoid | |
|---|---|---|---|
| What it is | Tear in canal lining | Tunnel from canal to skin | Swollen vein |
| Pain pattern | Sharp during/after BM, lingering ache | Variable; pain when blocked, relief when drains | Rarely sharp; aching, throbbing if thrombosed |
| Bleeding | Bright red, on paper or stool surface | Less common; with drainage | Bright red, often dripping into bowl |
| Drainage | None typically | Yes — pus, blood, fluid from outside opening | None typically |
| Visible features | Sentinel skin tag (chronic) | Small opening on skin near anus | Bulge, especially when straining |
| Triggered by | Hard stool, childbirth | Prior abscess | Straining, pregnancy, sitting |
| Healing | Most heal with home care | Almost never without surgery | Many resolve with conservative care |
Fissure pattern
The defining feature is sharp, tearing pain with bowel movements, often described as "passing glass," followed by a deep aching burn that lingers minutes to hours. Bright red blood on the toilet paper. Bowel movements become anxiety-provoking. Often follows a known constipation episode. Pain is the dominant symptom; drainage is usually absent.
Fistula pattern
The defining feature is recurrent drainage from a small opening near the anus. The pain pattern is different from a fissure — it's worst when the tract is blocked and pressure builds (like a re-forming abscess), and dramatically relieved when it drains. Often there's a history of a previous abscess that drained, either surgically or spontaneously. Bowel movements themselves may be normal in feel.
Hemorrhoid pattern
Internal hemorrhoids typically painless; the symptom is bright red bleeding (often dripping into the bowl) and sometimes a sense of fullness or a bulge that comes out with straining and reduces back in afterward. External hemorrhoids can cause pain — especially if a clot forms inside one (thrombosed external hemorrhoid), which produces a sudden tender purple lump that lasts days to a few weeks. Hemorrhoids do not typically cause sharp tearing pain with stool — that's a fissure pattern.
If you're not sure which is which
Take the symptom checker — eight branching questions that pattern-match to the most likely cause and tell you what to do next.
Take the symptom check
90 seconds, eight questions. Better than reading a wall of text and second-guessing yourself.
For all three conditions, a clinical exam is the only way to know for certain — most can be diagnosed in a 5-minute visit. If symptoms have been around longer than 6–8 weeks, are recurrent, or show any of the red-flag features, see a clinician rather than continuing to guess.