How you treat blood in your stool depends entirely on what’s causing it. The most common causes, like hemorrhoids and anal fissures, can often be managed at home with simple changes to your diet and bathroom habits. But blood in your stool can also signal something more serious, so the first step is understanding what the blood looks like, how much there is, and whether you have other symptoms alongside it.
What the Color of Blood Tells You
The color and appearance of blood in your stool is a useful clue about where the bleeding is coming from. Bright red blood typically means the source is lower in your digestive tract, in or near the colon, rectum, or anus. The blood is fresh and hasn’t traveled far, so it keeps its red color. This is common with hemorrhoids, anal fissures, and sometimes inflammatory conditions of the colon.
Black, tarry stool is a different situation. When blood originates higher up, usually in the stomach or upper small intestine, digestive chemicals break it down during the journey through your gut. By the time it reaches your stool, it’s turned dark and sticky. This type of bleeding often points to stomach ulcers, irritation of the stomach lining, or problems in the esophagus. Black stool from upper GI bleeding has a distinct, unusually foul smell that sets it apart from stool that’s simply dark because of something you ate, like iron supplements or bismuth medications.
When Blood in Stool Is an Emergency
Most rectal bleeding is minor and intermittent, but certain situations call for immediate medical attention. If you’re passing a continuous or heavy amount of blood, or if bleeding comes with severe abdominal pain or cramping, you need to get to an emergency room.
Call 911 if you notice any signs of shock alongside significant bleeding:
- Dizziness or lightheadedness when standing up
- Rapid, shallow breathing
- Fainting or confusion
- Cold, clammy, or pale skin
- Blurred vision
- Very low urine output
These symptoms mean your body is losing blood faster than it can compensate, and that requires urgent intervention.
Treating Hemorrhoids at Home
Hemorrhoids are the most common reason for bright red blood on toilet paper or in the bowl. They’re swollen blood vessels in and around the rectum, and they bleed easily when irritated by straining, hard stool, or prolonged sitting on the toilet. The good news is that most hemorrhoid bleeding resolves with conservative treatment over a week or two.
The single most effective change is softening your stool so you stop straining. Increase your fiber intake through whole grains, fruits, vegetables, and legumes. If your diet falls short, a fiber supplement like psyllium works well. For reference, adult women need roughly 22 to 28 grams of fiber daily depending on age, and adult men need about 28 to 34 grams. Most people fall well below these targets. Drink plenty of water alongside the extra fiber to keep things moving smoothly.
For pain and itching, over-the-counter creams or suppositories containing hydrocortisone can help, along with pads soaked in witch hazel or a topical numbing agent like lidocaine. One important note: don’t use hydrocortisone products for more than a week, as the steroid can thin your skin with prolonged use. Acetaminophen or ibuprofen can manage discomfort in the short term.
If hemorrhoids persist despite these measures, doctors can perform office-based procedures. Rubber band ligation, where a tiny band is placed around the base of an internal hemorrhoid to cut off its blood supply, is one of the most common. Infrared coagulation uses heat or light to shrink small bleeding hemorrhoids. For severe cases, surgical removal (hemorrhoidectomy) is an option. If a painful blood clot forms in an external hemorrhoid, a doctor can remove it in a quick procedure that provides near-immediate relief.
Treating Anal Fissures
Anal fissures are small tears in the lining of the anus, usually caused by passing hard or large stools. They produce sharp pain during bowel movements and bright red blood, often on the toilet paper. Most acute fissures heal on their own within a few weeks with the right care.
Sitz baths are one of the most effective home remedies. Sitting in warm water (as warm as you can comfortably tolerate) for about 15 minutes, several times a day, soothes the area and can provide hours of pain relief afterward. Combine this with the same fiber and hydration strategies used for hemorrhoids to keep stools soft and reduce further tearing.
When a fissure doesn’t improve after several weeks, a doctor may prescribe a topical ointment that relaxes the muscle around the anus and improves blood flow to help the tear heal. If one ointment doesn’t work after a few weeks, an alternative can be tried. For stubborn fissures, a Botox injection into the anal muscle is a one-time treatment that relaxes the area for about three months, giving the fissure time to close.
Medications That Can Cause GI Bleeding
If you’re taking certain medications, they could be contributing to or directly causing blood in your stool. NSAIDs (like ibuprofen, naproxen, and aspirin) are strongly linked to bleeding in both the upper and lower digestive tract. They irritate the stomach lining and reduce your body’s ability to protect it, which can lead to ulcers that bleed.
Blood thinners raise the risk further. People taking warfarin or similar anticoagulants who also use NSAIDs have roughly 2.5 times the risk of gastrointestinal bleeding compared to those on the blood thinner alone. Newer blood thinners carry a similar pattern: combining them with NSAIDs approximately doubles the risk of GI bleeding. If you’re on any blood-thinning medication and notice blood in your stool, bring it up with your prescriber promptly. Adjusting your medications or adding stomach protection may be necessary, but don’t stop a blood thinner on your own.
How Doctors Find the Source
When bleeding is new, recurrent, or can’t be explained by an obvious hemorrhoid or fissure, your doctor will want to look inside your digestive tract. A colonoscopy, where a flexible camera examines the entire colon, is the standard diagnostic tool for lower GI bleeding. It allows the doctor to see the source directly and, in many cases, treat it during the same procedure.
For younger patients under 40 with minor bleeding and no other risk factors, some doctors may start with a more limited exam of just the lower portion of the colon. But a full colonoscopy is generally recommended whenever there’s unexplained bleeding, persistent symptoms, or any additional risk factors like a family history of colon cancer or unexplained weight loss.
For upper GI bleeding (suggested by black, tarry stools), an upper endoscopy, which looks at the esophagus, stomach, and upper small intestine, is typically the first test.
Bleeding From Inflammatory Bowel Disease
Ulcerative colitis and Crohn’s disease can both cause bloody stool, often accompanied by diarrhea, abdominal pain, and urgency. In ulcerative colitis especially, bloody diarrhea is one of the hallmark symptoms. Treatment focuses on controlling the underlying inflammation to stop the bleeding at its source.
Mild to moderate cases are often managed with anti-inflammatory medications taken by mouth or as a rectal suppository. When the disease is more aggressive, doctors turn to medications that suppress the overactive immune response driving the inflammation. Biologic therapies, given by injection or infusion, target specific proteins involved in gut inflammation. These treatments have transformed IBD management over the past two decades, and newer options continue to expand the choices available. The goal is sustained remission, where the inflammation stays quiet and the bleeding stops.
Diverticular Bleeding
Diverticular bleeding happens when small pouches that form in the colon wall (diverticulosis) erode into a blood vessel. It tends to come on suddenly and produce a large volume of bright red or maroon blood, which can be alarming. Most episodes stop on their own, but the amount of blood loss usually requires hospitalization for monitoring and sometimes fluid or blood replacement.
Once a patient is stable, colonoscopy is used to locate and treat the bleeding site. If the bleeding is too heavy for a colonoscopy to work, imaging with a CT scan can pinpoint the location, followed by a procedure to block the bleeding vessel. Surgery is reserved for rare cases where all other approaches fail.
Don’t Skip Screening
Blood in your stool can occasionally be an early sign of colorectal cancer or precancerous polyps. The U.S. Preventive Services Task Force recommends colorectal cancer screening starting at age 45 for adults at average risk, continuing through age 75. Before 2021, the starting age was 50, so some people in their late 40s may not realize they’re now in the recommended window. If you have a family history of colorectal cancer or certain genetic conditions, screening often starts earlier.
Screening catches problems before they cause symptoms. But if you’re already seeing blood, don’t wait for a scheduled screening. Any new or unexplained rectal bleeding, especially after age 45, changes in bowel habits that last more than a few weeks, or bleeding paired with unintentional weight loss warrants a conversation with your doctor and likely a colonoscopy to rule out something serious.