Chronic blood loss
What is Chronic blood loss?
Chronic blood loss happens when your body loses small amounts of blood over weeks or months. Unlike sudden bleeding from an injury, this type of blood loss is often hidden and hard to notice. You might lose blood through your digestive tract, heavy menstrual periods, or other sources you cannot see.
Over time, chronic blood loss drains your body of red blood cells faster than it can replace them. Red blood cells carry oxygen to every part of your body. When levels drop too low, you develop anemia, a condition that leaves you tired and weak. The key is finding where the blood is going and stopping the loss before it causes serious problems.
Many people do not realize they are losing blood because it happens slowly. The blood may be mixed with stool or absorbed into menstrual flow. Your body tries to keep up by making more red blood cells, but eventually it falls behind. Testing your blood can reveal the problem before you feel severely ill.
Symptoms
- Unusual tiredness or fatigue that does not go away with rest
- Pale skin, nail beds, or inside of eyelids
- Shortness of breath during normal activities
- Dizziness or lightheadedness when standing up
- Rapid or irregular heartbeat
- Cold hands and feet
- Headaches or difficulty concentrating
- Dark, tarry stools or black bowel movements
- Very heavy or prolonged menstrual periods
- Unusual bruising or bleeding
Some people have no obvious symptoms in the early stages. The body adapts slowly to lower red blood cell levels. By the time symptoms appear, the blood loss may have been happening for months.
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Causes and risk factors
Chronic blood loss usually comes from the digestive system or reproductive organs. Stomach ulcers, inflammatory bowel disease, and colon polyps can cause slow bleeding in your gut. Heavy menstrual periods are a common source for women. Some cancers in the stomach or colon bleed slowly over time. Frequent use of aspirin or anti-inflammatory drugs can irritate the stomach lining and cause bleeding.
Risk factors include age over 50, a family history of digestive problems, and regular use of blood-thinning medications. Poor nutrition can worsen the problem because your body needs iron, vitamin B12, and folate to make new red blood cells. People with bleeding disorders or chronic kidney disease face higher risk. Finding the source early prevents complications like severe anemia and organ damage.
How it's diagnosed
Doctors diagnose chronic blood loss by testing your blood for red blood cell count and related markers. A low red blood cell count often signals ongoing blood loss or poor blood cell production. Your doctor will look at the size and shape of your cells to understand the type of anemia. Additional tests may check iron levels, vitamin B12, and other nutrients needed to make healthy blood cells.
Once blood tests show anemia, your doctor will search for the bleeding source. This may include stool tests for hidden blood, endoscopy to look inside your digestive tract, or imaging studies. Women may need pelvic exams to check for heavy menstrual bleeding. Rite Aid offers comprehensive blood testing that includes red blood cell count to help identify chronic blood loss early. Regular monitoring helps track your response to treatment and ensures the bleeding has stopped.
Treatment options
- Identify and treat the source of bleeding with medical or surgical intervention
- Take iron supplements to rebuild red blood cell stores
- Eat iron-rich foods like lean meat, beans, dark leafy greens, and fortified cereals
- Add vitamin C to meals to help your body absorb iron better
- Take vitamin B12 or folate supplements if levels are low
- Stop or change medications that cause stomach irritation when possible
- Manage heavy menstrual periods with hormonal treatments or other therapies
- Treat underlying conditions like ulcers, polyps, or inflammatory bowel disease
- Get regular blood tests to monitor red blood cell recovery
- Consider blood transfusions for severe cases until the source is controlled
Concerned about Chronic blood loss? Get tested at Rite Aid.
- Simple blood draw at your nearest lab
- Results in days, not weeks
- Share results with your doctor
Frequently asked questions
The most common causes are heavy menstrual periods in women and slow bleeding from the digestive tract. Stomach ulcers, colon polyps, and inflammatory bowel disease often bleed small amounts over months. Regular use of aspirin or anti-inflammatory drugs can also irritate the stomach lining and cause hidden bleeding.
The timeline varies based on how much blood you lose each day. Small amounts of bleeding can take weeks or months to deplete your red blood cell stores. Your body tries to compensate by making more cells, but eventually it cannot keep up. Many people do not notice symptoms until their red blood cell count drops significantly.
Yes, a red blood cell count can reveal chronic blood loss by showing low levels. The test also shows the size and color of your cells, which helps identify the type of anemia. Additional tests for iron, ferritin, and other nutrients help confirm the diagnosis and guide treatment.
A gradual drop in red blood cell count often signals ongoing blood loss or a problem making new cells. Your doctor will investigate possible bleeding sources and check your nutrient levels. Regular monitoring helps track whether the problem is stable, worsening, or improving with treatment.
Chronic blood loss happens slowly over weeks or months, while acute blood loss occurs suddenly. Acute bleeding is obvious and causes immediate symptoms like shock. Chronic bleeding is often hidden and your body adapts gradually, so you may not notice symptoms until anemia becomes severe.
Eat iron-rich foods like lean red meat, chicken, fish, beans, lentils, and dark leafy greens. Fortified cereals and breads also provide iron. Pair these foods with vitamin C sources like citrus fruits, tomatoes, and peppers to help your body absorb iron better. Avoid drinking tea or coffee with meals because they block iron absorption.
Talk to your doctor before stopping any medication. Aspirin and anti-inflammatory drugs can cause stomach bleeding, but stopping them suddenly may be dangerous if you take them for heart protection. Your doctor can adjust your medications or add stomach-protecting drugs to reduce bleeding risk while keeping you safe.
Most people need blood tests every 3 to 6 months during treatment and recovery. Your doctor may test more often if your anemia is severe or the bleeding source is not yet controlled. Once your red blood cell count stabilizes, annual testing helps ensure the problem has not returned.
Severe or long-term chronic blood loss can strain your heart and other organs because they do not get enough oxygen. This can lead to heart problems or organ damage if left untreated. Finding and stopping the bleeding source early prevents these complications and allows your body to recover fully.
Yes, chronic blood loss can be serious even without symptoms. Your body adapts slowly to lower red blood cell levels, so you may not realize how anemic you have become. The underlying cause, such as a bleeding ulcer or colon polyp, may worsen without treatment. Getting tested helps catch the problem before it causes serious harm.