Frequent or persistent bleeding usually points to one of a few broad causes: a medication side effect, a hormonal or structural issue (especially with periods), a nutritional deficiency, a blood clotting disorder, or a localized problem like gum disease or dry nasal passages. The pattern of your bleeding, where it happens, and how long it lasts are the biggest clues to what’s going on.
Heavy or Irregular Periods
If “bleeding all the time” means your periods are heavier, longer, or more frequent than they used to be, you’re dealing with what clinicians call abnormal uterine bleeding. A normal cycle falls between 21 and 35 days apart, with bleeding lasting 2 to 7 days. Periods that come more often than every 21 days, last longer than a week, or soak through a pad or tampon every hour or two fall outside that range.
The causes split into two groups: structural and hormonal. On the structural side, fibroids (benign growths in the uterine wall) are one of the most common culprits, particularly when they grow near the inner lining of the uterus. Endometrial or cervical polyps, which are small tissue outgrowths, can also trigger bleeding between periods. On the hormonal side, conditions like polycystic ovary syndrome (PCOS) and thyroid dysfunction disrupt ovulation, leading to irregular, heavy, or prolonged bleeding. Even without a named condition, shifts in hormone levels during perimenopause or after stopping birth control can throw off your cycle for months.
Medications That Increase Bleeding
Blood thinners are an obvious cause, but over-the-counter pain relievers are a sneakier one. Common anti-inflammatory drugs like ibuprofen, naproxen, and diclofenac interfere with how your blood clots. A large Danish study found that people already on oral anticoagulants who also took NSAIDs had more than double the overall bleeding rate. Naproxen carried the highest added risk, roughly quadrupling it, while ibuprofen nearly doubled it. Even aspirin, often taken daily for heart protection, reduces clotting ability.
Supplements matter too. Fish oil, vitamin E, and certain herbal products like ginkgo and garlic supplements can thin the blood enough to cause easy bruising, longer bleeding from cuts, or heavier periods. If you’re taking any combination of these alongside a prescribed blood thinner, the effects stack up quickly. Reviewing everything you take, including supplements, with a pharmacist or doctor can reveal an obvious explanation for bleeding that seems to come from nowhere.
Blood Clotting Disorders
Some people bleed frequently because their blood doesn’t form clots the way it should. The most common inherited clotting disorder is von Willebrand disease, which affects up to 1% of the population. It causes prolonged bleeding from cuts, frequent nosebleeds, easy bruising, and unusually heavy periods. Many people with mild forms go undiagnosed for years because the symptoms seem like just “how their body works.”
Hemophilia is rarer but follows a similar pattern in mild cases. People with mild hemophilia often don’t know they have it until a surgery, dental extraction, or injury produces bleeding that won’t stop. Women with mild hemophilia frequently experience heavy menstrual bleeding and can bleed extensively after childbirth. A simple blood test measuring clotting factor levels and clotting time can identify or rule out these conditions.
Bleeding Gums
If your bleeding is concentrated in your mouth, gum disease is the most likely explanation. Gingivitis, the mildest form, causes gums that are red, swollen, and bleed easily when you brush or floss. It’s driven by plaque, the sticky bacterial film that builds up on teeth. Left alone, plaque hardens into tartar that you can’t remove with a toothbrush, and bacteria spread below the gumline.
At that point, gingivitis can progress to periodontitis, a more serious condition involving bone loss around the teeth. Signs include gums pulling away from the teeth, loose teeth, painful chewing, and persistent bleeding. Smoking, diabetes, poor nutrition, hormonal changes (like pregnancy or menopause), and certain medications that cause dry mouth all raise the risk. The good news is that gingivitis is fully reversible with better oral hygiene and professional cleaning. Periodontitis can be managed but not reversed, so catching it early matters.
Frequent Nosebleeds
Chronic nosebleeds have both local and systemic causes. The most common local triggers are dry air (especially in winter when indoor heating drops humidity), nose picking, a deviated septum, and allergies that keep nasal tissue inflamed. These causes are annoying but not dangerous.
Systemic causes are less common but worth knowing about. High blood pressure, alcohol use, clotting disorders like von Willebrand disease, and blood vessel malformations can all produce nosebleeds that recur frequently or are hard to stop. If your nosebleeds happen several times a week, last longer than 20 minutes, or accompany easy bruising elsewhere on your body, the issue is more likely systemic than local.
Nutritional Deficiencies
Your body needs specific vitamins to build the proteins that form blood clots. Vitamin K is essential for this process. While severe vitamin K deficiency is uncommon in adults who eat a varied diet, it can develop in people with conditions that impair fat absorption (like celiac disease, Crohn’s, or chronic liver disease), since vitamin K is a fat-soluble vitamin. Symptoms include bruising easily and bleeding that’s slow to stop.
Vitamin C deficiency, though rare in developed countries, causes a condition called scurvy that breaks down the walls of small blood vessels. Early signs include bleeding gums, small red or purple spots on the skin, and slow wound healing. People most at risk are those with very restricted diets, heavy alcohol use, or smoking habits (which deplete vitamin C faster).
When Chronic Bleeding Leads to Anemia
Whatever the cause, bleeding that continues over weeks or months can drain your iron stores and lead to iron-deficiency anemia. Your body uses iron to build hemoglobin, the protein in red blood cells that carries oxygen. When iron runs low, your red blood cells become smaller and carry less oxygen, which is why the hallmark symptoms are fatigue, shortness of breath during activity, and feeling lightheaded.
More specific signs of iron deficiency include hair loss, a sore or swollen tongue, cravings for non-food items like ice or dirt (a phenomenon called pica), cracked corners of the mouth, and difficulty concentrating. In severe or long-standing cases, nails can become thin and spoon-shaped. Anemia is diagnosed with a blood test: hemoglobin below 13 g/dL in men or below 12 g/dL in non-pregnant women, combined with a ferritin level below 45 ng/mL, confirms iron deficiency as the cause. Treating the anemia with iron is only half the job. Finding and addressing the source of bleeding is what stops the cycle.
Signs That Need Immediate Attention
Most causes of frequent bleeding are manageable, but certain symptoms signal a more urgent situation. Blood in your stool (bright red or black and tarry), blood in your urine, or coughing or vomiting blood all warrant prompt medical evaluation. If bleeding is accompanied by dizziness, a rapid heartbeat, shortness of breath, unusual fatigue, or nausea, these can indicate significant blood loss. Confusion, seizures, or loss of consciousness are signs of a medical emergency and require calling 911 immediately.