Can Uterine Fibroids Cause Fatigue and Shortness of Breath?

Yes, uterine fibroids can contribute to extreme fatigue, headaches, shortness of breath, and palpitations. However, fibroids generally do not cause these symptoms directly. Instead, they can trigger them indirectly through heavy menstrual bleeding. Over time, chronic blood loss depletes your body’s iron stores, leading to iron deficiency and eventually iron-deficiency anemia ^[1][2].

When you lose blood faster than your body can replace it, your iron levels drop ^[3][4]. Your body needs iron to make hemoglobin, the protein in red blood cells that carries oxygen from your lungs to the rest of your body. When hemoglobin drops, your blood carries less oxygen, and your body must work much harder to compensate ^[5].

How Iron Loss Contributes to Systemic Symptoms

When your blood has a reduced oxygen-carrying capacity, it can trigger a chain reaction of compensatory mechanisms:

• Extreme Fatigue: Fatigue is a recognized and profound symptom of iron deficiency ^[6]. Importantly, this fatigue can occur even before your hemoglobin levels drop low enough to be officially diagnosed as anemia ^[7].
• Palpitations and Racing Heart: To make up for the lower oxygen levels in your blood, your heart may pump faster and harder ^[8]. This can feel like a racing heart, a pounding chest, or palpitations ^[9][5].
• Shortness of Breath: Because your blood is carrying less oxygen, everyday activities like climbing a flight of stairs can leave you feeling winded or breathless ^[5][10].
• Headaches and Dizziness: Reduced oxygen delivery can result in frequent headaches, lightheadedness, or feeling dizzy ^[9].

An Important Note on Symptoms: While fibroid-related anemia is a common cause of these issues, it is not the only cause. Palpitations, extreme fatigue, and shortness of breath can also be signs of heart conditions, lung disease, thyroid problems, or medication side effects. Never assume these symptoms are solely due to fibroids without proper medical evaluation.

Normalizing Heavy Bleeding

Many patients with fibroids assume that because they have dealt with heavy periods for years, their bleeding is “normal” for them. Heavy menstrual bleeding is generally defined as soaking through a pad, tampon, or menstrual cup every hour for several consecutive hours, needing to wake up to change products overnight, or passing clots larger than a quarter ^[11].

Heavy menstrual bleeding is a major cause of chronic iron loss in premenopausal women ^[12][13]. Even if you have adapted your lifestyle around your periods, long-standing bleeding is not harmless, and the physical toll of chronic blood loss should be evaluated.

Urgent Symptoms: When to Seek Immediate Care

While mild fatigue should be discussed at a regular doctor’s appointment, severe anemia or rapid blood loss requires emergency medical assessment. Do not drive yourself; call emergency services or go to the nearest emergency department if you experience:

• Fainting (syncope) or near-fainting spells ^[14][15]
• Chest pain
• Severe shortness of breath while resting
• Confusion or altered consciousness ^[15]
• Inability to stand up or walk normally without feeling like you will pass out ^[16][17]
• Rapidly worsening or uncontrollable vaginal bleeding

These symptoms can signal severe anemia or another critical emergency. Emergency medical professionals will check your vital signs, assess your blood loss, and run tests to determine the safest course of treatment ^[16][18].

Getting the Right Tests

If you have fibroids and are experiencing fatigue or shortness of breath, ask your clinician about blood testing. A standard Complete Blood Count (CBC) checks your hemoglobin, but a normal CBC does not always rule out iron deficiency ^[19].

It is often helpful to also check a ferritin level, which measures your body’s stored iron ^[20][21]. You can have depleted iron stores and experience intense fatigue before your CBC shows full-blown anemia ^[19][6]. While a ferritin level below 30 ng/mL is frequently used to identify iron deficiency, there is no single universal target; inflammatory conditions, infections, and liver disease can falsely elevate ferritin, so your clinician will interpret the results in context ^[20].

Your doctor may also evaluate you for other causes of iron loss, such as gastrointestinal bleeding, poor dietary absorption, or underlying bleeding disorders ^[20][22].

The Dual Approach to Treatment

Treating fibroid-induced anemia requires a two-step approach: replacing the missing iron and managing the ongoing blood loss ^[2][23].

1. Replacing the Iron

Oral iron supplements (like ferrous sulfate) are the standard first step ^[24]. However, oral iron can cause gastrointestinal side effects like constipation or nausea. If you cannot tolerate oral iron, if your levels do not improve, or if you need rapid replenishment (such as before a planned surgery), your doctor might discuss intravenous (IV) iron ^[24][25]. IV iron requires monitoring for allergic reactions and is generally reserved for specific clinical situations.

2. Stopping the Bleeding

Iron replacement may not keep up with ongoing losses unless the heavy menstrual bleeding is also addressed. Treatment options must be individualized based on your age, health history, and whether you wish to preserve your fertility:

• Medical Options: Medications like tranexamic acid, hormonal birth control, or GnRH antagonists (such as relugolix) can help reduce bleeding ^[2][26]. However, these are not suitable for everyone; some carry risks regarding bone health or blood clots, and their use requires clinical guidance.
• Procedural Options: If medications fail or aren’t right for you, options include myomectomy (which removes fibroids but preserves the uterus and potential fertility), uterine artery embolization (which shrinks fibroids by blocking their blood supply but may impact fertility), or hysterectomy (which removes the uterus completely and permanently ends the ability to carry a pregnancy) ^[23][2][27].

Recovering your iron stores and energy levels takes time. Follow up with your clinician regularly to monitor your CBC and ferritin, manage any medication side effects, and ensure your treatment plan is working ^[3][24].