Can a Uterine Polyp Cause Iron-Deficiency Anemia, Too?

Yes, an endometrial (uterine) polyp—a growth on the inner lining of the uterus—can cause or contribute to heavy menstrual bleeding ^[1]. While a polyp can be the primary cause of heavy periods, it may also coexist with other causes, meaning a normal-looking polyp does not prove that all blood loss comes from it ^[2]. Over time, losing more blood during your period than your body can replace depletes your iron stores. Without enough iron, your body cannot produce enough healthy red blood cells to carry oxygen to your organs, resulting in iron-deficiency anemia ^[3]. (Note: Any bleeding that happens during pregnancy or after menopause is not routine heavy menstrual bleeding and requires separate, prompt medical evaluation ^[4].)

Symptoms of Iron-Deficiency Anemia

Many people attribute feeling tired to a busy lifestyle, but it may actually be a sign of anemia. Symptoms of iron deficiency and anemia can range from mild to severe and may include:

• Persistent fatigue or weakness ^[5]
• Shortness of breath (dyspnea), especially during exertion ^[5]
• Lightheadedness or dizziness ^[6]
• A racing or pounding heartbeat (palpitations) ^[6]
• Headaches ^[6]
• Reduced ability to exercise or complete normal daily tasks ^[5]

How Anemia is Evaluated

To determine if heavy bleeding has caused anemia, your doctor will likely order specific blood tests.

• Complete Blood Count (CBC): This test measures your hemoglobin, the protein in red blood cells that carries oxygen. However, a normal hemoglobin level does not mean your iron levels are fine; early iron deficiency can occur before your hemoglobin falls ^[7].
• Ferritin: This test measures the amount of stored iron in your body. A ferritin level below 30 ng/mL is a commonly used threshold to support a diagnosis of iron deficiency ^[5]. However, this result requires clinical interpretation because ferritin can be falsely normal or elevated if you have inflammation, infection, or other conditions ^[8].
• Iron Studies: If your ferritin results are unclear, tests like transferrin saturation (a measure of how much iron is actively being transported in the blood) can provide supporting evidence of iron deficiency ^[5].

When to Seek Urgent or Emergency Care

Heavy menstrual bleeding can sometimes cause dangerous levels of blood loss. It is important to know the difference between bleeding that requires a prompt doctor’s visit and bleeding that requires emergency care.

Seek emergency medical care (call 911 or go to the nearest emergency room, and do not drive yourself) if you experience signs of hemodynamic instability—meaning your blood loss is so severe your body cannot maintain blood pressure or oxygen flow. Signs include:

• Fainting or severe dizziness ^[9]
• Chest pain or a racing heartbeat ^[3]
• Shortness of breath while resting ^[3]
• Severe weakness or confusion ^[9]

Seek same-day or urgent clinician assessment if you are:

• Persistently soaking through one or more pads or tampons per hour for two or more consecutive hours ^{[10] [11]}.
• Passing blood clots larger than a quarter. (While passing large clots is a sign of heavy bleeding, it is not by itself an automatic reason for an emergency room visit unless accompanied by the severe symptoms above ^[11].)

Treating the Blood Loss and the Polyp

Managing this condition requires a two-part approach: replenishing your iron and stopping the heavy bleeding.

1. Treating the Iron Deficiency

Treating the anemia is critical and should happen alongside efforts to control the bleeding ^[12].

• Oral Iron: Iron pills are generally the first line of treatment. Depending on the formulation and your gastrointestinal tolerance, they may be taken daily or every other day ^[13]. Common side effects include nausea, constipation, and dark stools. Your doctor will typically recheck your blood work in 2 to 4 weeks, though this timeline is individualized ^[13]. Importantly, iron must often be continued even after hemoglobin normalizes because replenishing the deeper iron stores takes longer ^[13]. (Always keep iron supplements away from children.)
• Intravenous (IV) Iron: If your anemia is severe, if you cannot tolerate the side effects of oral iron, or if rapid correction is needed before a surgery, your doctor may recommend IV iron infusions ^{[12] [13]}. Note that IV iron takes time to work and does not instantly replace lost blood volume ^[12].
• Hospital Care: For major, acute blood loss or unstable circulation, hospital treatment with IV fluids and, in selected cases, a red-blood-cell transfusion may be necessary ^{[14] [12]}. The decision to transfuse depends on your symptoms, hemoglobin levels, and overall stability ^[12].

2. Treating the Heavy Bleeding

Medications can help reduce the bleeding while you await further evaluation or definitive treatment ^[3].

• Medical Management: Options include tranexamic acid (a non-hormonal medication that helps blood clot), continuous or extended-cycle progestins (hormones taken without a break to stop bleeding), or a hormonal IUD ^{[15] [16]}. These treatments can significantly reduce heavy menstrual bleeding, but they do not remove the polyp ^[15]. The best choice for you depends on your need for contraception, pregnancy plans, clotting risks, and other medical conditions.
• Polyp Removal: Hysteroscopic polypectomy is a minimally invasive procedure where a thin camera and specialized instruments are passed through the vagina and cervix to remove the polyp, usually without any external incisions ^[17]. Complete removal often significantly improves abnormal bleeding, though it is not a guarantee that bleeding will stop entirely ^{[17] [18]}.
• Pathology: The removed polyp tissue is routinely sent for histopathologic examination (a laboratory check under a microscope) to check for abnormal cells or cancer ^[4]. Always ask your doctor to review these pathology results with you.

What if Anemia Persists?

While removing a uterine polyp resolves the bleeding for many patients, it doesn’t work for everyone. If your heavy bleeding or anemia persists after treatment, further evaluation is essential ^[4].

First, heavy menstrual bleeding can be caused by other conditions like uterine fibroids, adenomyosis (when the uterine lining grows into the muscle wall), or underlying bleeding disorders ^{[2] [19]}. These conditions can coexist with a polyp and may require separate treatment ^[2].

Second, do not assume that menstrual blood loss is the only reason for your iron deficiency. If your iron levels do not improve with treatment, your doctor may need to investigate other causes, such as gastrointestinal bleeding or impaired iron absorption (such as celiac disease) ^[5].