Gastrointestinal Bleeding: Causes, Risks, and What You Need to Know

When you hear gastrointestinal bleeding, the loss of blood from the digestive tract. Also known as GI bleeding, it’s not just a symptom—it’s a red flag that something deeper is wrong. This isn’t a minor upset stomach. It’s blood in your stool, vomit, or even just feeling weak for no reason. It can sneak up slowly, or hit you like a truck. Either way, it needs attention.

There are two main types: upper GI bleed, originating from the esophagus, stomach, or first part of the small intestine, and lower GI bleed, coming from the colon, rectum, or anus. Upper GI bleeds often mean ulcers, torn blood vessels from vomiting, or liver disease. Lower GI bleeds? Think diverticulosis, hemorrhoids, or inflamed intestines. And while hemorrhoids are common, not every streak of red is harmless. Sometimes it’s colon cancer. That’s why you don’t ignore it.

Medications play a big role too. NSAIDs like ibuprofen or aspirin? They’re linked to stomach ulcers. Blood thinners? They don’t cause bleeding directly, but they turn a small tear into a major problem. Even some antidepressants and antibiotics can quietly increase your risk. And if you’re older, or have high blood pressure, diabetes, or a history of alcohol use—your chances go up. It’s not just about what you take, but who you are.

What you see isn’t always what’s happening. Bright red blood? Likely lower. Dark, tarry stool? That’s upper. Vomiting blood? That’s urgent. But sometimes, there’s no sign at all—just fatigue, dizziness, or a rapid heartbeat. That’s when labs catch it. A low hemoglobin level can be the first clue. And if you’re on chronic meds, especially for pain or heart issues, you’re already in a higher-risk group. Monitoring isn’t optional.

This isn’t about scare tactics. It’s about knowing when to act. A GI bleed can be mild and resolve on its own—or it can kill you in hours. The difference? Speed. Recognition. Knowing what to watch for. The posts below don’t just talk about drugs or side effects—they connect the dots between medications you take, your body’s response, and the hidden risks that lead to bleeding. You’ll find real stories about what happens when bleeding is missed, how certain drugs increase the danger, and what steps you can take to protect yourself before it’s too late.