Blood on the toilet paper after wiping is almost always caused by hemorrhoids or a small tear in the skin around the anus. These two conditions account for the vast majority of cases, and both are treatable. That said, the color of the blood, how much there is, and whether you have other symptoms all matter in figuring out what’s going on.
Hemorrhoids: The Most Common Cause
Hemorrhoids are swollen veins in the rectum or anus, similar to varicose veins. They’re the single most common reason people see blood when they wipe. They develop from pressure on the veins in the anal area, often from straining during bowel movements, sitting on the toilet for long periods, or chronic constipation. Pregnancy is another common trigger.
The blood from hemorrhoids is typically bright red and may show up on the toilet paper, drip into the bowl, or coat the surface of your stool. Hemorrhoids can produce a noticeable amount of blood, sometimes with small clots. Internal hemorrhoids (inside the rectum) usually bleed without pain, while external ones (around the opening) tend to be painful, itchy, or swollen. Many people have hemorrhoids without ever knowing it until they see blood.
Most hemorrhoids resolve on their own within a few days to a couple of weeks. Over-the-counter creams, warm baths, and softer stools from dietary changes speed things along. If they keep coming back or become severe, a doctor can offer procedures to shrink or remove them.
Anal Fissures: Small Tears, Sharp Pain
An anal fissure is a tiny tear in the lining of the anus, usually caused by passing a hard or large stool. The hallmark difference from hemorrhoids is pain: fissures typically cause a sharp, stinging sensation during and after a bowel movement, sometimes lasting minutes to hours. The bleeding tends to be a small streak of bright red blood on the toilet paper rather than dripping into the bowl.
Fissures heal on their own in most cases, especially once you soften your stools. Keeping the area clean, using warm sitz baths, and avoiding straining all help. Chronic fissures that don’t heal after several weeks may need prescription ointments that relax the muscle around the anus and improve blood flow to the tear.
What the Blood Looks Like Matters
Bright red blood on the toilet paper or in the bowl points to bleeding from the lower end of the digestive tract: the rectum or anus. This is what hemorrhoids and fissures produce. It’s fresh blood, which means it hasn’t traveled far.
Dark red or maroon-colored blood mixed into your stool suggests bleeding higher up in the colon. Black, tarry stools (with a distinctive foul smell) indicate bleeding even further upstream, in the stomach or small intestine. It takes roughly 100 to 200 mL of blood in the upper digestive tract to produce that tarry appearance, and the dark color comes from stomach acid breaking down the blood as it passes through. If you see dark or black stools, that’s a different situation from a streak of red on the paper and warrants prompt medical attention.
Less Common But Worth Knowing
Inflammatory bowel disease, which includes Crohn’s disease and ulcerative colitis, can cause rectal bleeding. But it rarely shows up as blood on the toilet paper alone. IBD typically comes with other persistent symptoms: diarrhea, abdominal pain and cramping, unintentional weight loss, extreme fatigue, and loss of appetite. Ulcerative colitis specifically affects the colon and rectum, so blood in the stool is a prominent feature. These conditions cycle between flare-ups and periods of remission.
Proctitis, or inflammation of the rectal lining, is another possibility. It can result from sexually transmitted infections (gonorrhea, herpes, chlamydia), foodborne bacterial infections like salmonella or shigella, or as a side effect of radiation therapy to the pelvic area. Proctitis often causes a feeling of urgency, rectal pain, and mucus discharge alongside the bleeding.
Colorectal polyps and colorectal cancer can also cause rectal bleeding, though they’re far less common than hemorrhoids in younger adults. The U.S. Preventive Services Task Force recommends that everyone begin routine colorectal cancer screening at age 45 and continue through age 75. If you’re under 45 and have persistent bleeding with no obvious cause, or if you have a family history of colorectal cancer, earlier screening may be appropriate.
Signs That Need Immediate Attention
A small amount of bright red blood that happens once or twice after a hard bowel movement is rarely an emergency. But certain patterns signal something more serious:
- Heavy or continuous bleeding that doesn’t stop
- Dizziness or lightheadedness when you stand up
- Rapid, shallow breathing or feeling faint
- Severe abdominal pain or cramping alongside the bleeding
- Cold, clammy, or pale skin
- Confusion or blurred vision
These are signs of significant blood loss and require emergency care. The same goes for bleeding that’s accompanied by a fever, unexplained weight loss, or a change in bowel habits lasting more than a few weeks.
How Doctors Figure Out the Cause
If you visit a doctor about rectal bleeding, the initial evaluation is straightforward. A physical exam of the area can often identify external hemorrhoids or fissures on sight. A digital rectal exam, where the doctor inserts a gloved, lubricated finger into the rectum, can detect internal hemorrhoids, tenderness, or unusual masses.
When the cause isn’t obvious from a physical exam, or when bleeding persists, a scope exam may be needed. A proctoscopy (also called a rigid sigmoidoscopy) looks at just the rectum and anus. A flexible sigmoidoscopy extends the view to the lower third of the colon. A full colonoscopy examines the entire large intestine. All use a thin, flexible tube with a camera on the end. Which one your doctor recommends depends on your age, symptoms, and risk factors.
How to Prevent It From Happening Again
Since straining and hard stools are behind most cases of hemorrhoids and fissures, the best prevention is keeping things soft and moving. Fiber is the cornerstone: women should aim for 25 to 30 grams per day, and men should target 30 to 38 grams. Fruits, vegetables, beans, whole grains, and seeds are the most practical sources. If you’re currently eating much less than that, increase gradually over a couple of weeks to avoid bloating and gas.
Water makes fiber work. As you increase fiber, increase your fluid intake at the same time. Without enough water, extra fiber can actually make constipation worse. Beyond diet, avoid sitting on the toilet longer than necessary (put the phone down), don’t strain or hold your breath during a bowel movement, and try to go when you feel the urge rather than delaying. Regular physical activity also helps keep your digestive system moving consistently.
If constipation is a chronic issue for you despite these changes, an over-the-counter stool softener or fiber supplement can bridge the gap while your body adjusts to a higher-fiber diet.