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Heart Disease Symptoms and Side Effects/Physical Symptoms and Side Effects

Cardiac Cough: What It Sounds Like and Other Heart Failure Symptoms

Medically reviewed by Vedran Radonić, M.D., Ph.D.
Written by Destiny Nkechi, M.D.
Updated on September 8, 2026

Key Takeaways

  • A cardiac cough is a persistent cough that can develop in people living with heart failure, caused by fluid buildup in the lungs that triggers the body's natural cough reflex.
    • View all takeaways

If you find that you cough more when you lie flat and feel relief when you sit up or stack your pillows like a tower, you may have what’s known as a cardiac cough.

Many people with heart failure notice this kind of cough along with other symptoms, like shortness of breath, leg swelling, and fatigue.

In this article, you’ll learn what causes a cardiac cough, how it differs from other causes of cough, and what you can do to ease the symptom.

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How Heart Failure Can Cause Cardiac Cough

Cardiac cough in heart failure stems from fluid buildup in the lungs.

Coughing is a natural reaction to irritants in your lungs, such as mucus or dust. Receptors in your lungs act like tiny antennas, sending a message to your brain when they sense something irritating. That message triggers the cough reflex.

Think of your heart as a pump that moves blood around your body. When heart failure weakens that pump, blood can back up in the vessels leading from your lungs to your heart.

This raises the pressure in those vessels, causing fluid to leak into your lungs (pulmonary edema). The extra fluid irritates your lungs and triggers a persistent cough that won’t improve with over-the-counter cough medications.

What Does a Cardiac Cough Sound Like?

A cardiac cough usually sounds wet, gurgly, or hacking, almost like the sound of blowing bubbles into a drink through a straw.

You may cough up mucus and saliva (called sputum) that is frothy, clear, white, or tinged pink with blood. You might also have a high-pitched wheeze as you breathe in or out. A cardiac cough is different from a typical cold or flu cough, since it’s caused by fluid backing up into your lungs rather than a virus.

Other characteristics of a cardiac cough include:

  • Worsens when lying flat — The cough or breathlessness often flares at night, forcing you to sit up to catch your breath
  • Chest pain or pressure — Discomfort or tightness that may come and go along with the cough

While heart failure typically causes a wet, persistent cough, it can also be dry, especially in the earlier stages of your disease. As more fluid builds up, the cough turns wet and frothy. A dry cough can also be related to ACE inhibitors, a common heart failure medication.

How Cardiac Cough Differs From Other Coughs

A persistent cough can have many possible causes, which is part of why heart failure often gets missed at first. Here’s how a cardiac cough tends to compare.

Respiratory Infections

In respiratory infections, such as colds, flu, and pneumonia, your airways get inflamed, and you produce extra mucus as your body fights off the infection.

Here are some other key characteristics:

  • Sound and phlegm — A hacking or deep cough, producing yellow or green mucus
  • Key trigger — Viruses or bacteria in the airways
  • Associated signs — Fever, body aches, sore throat, and chills

Asthma

In asthma, inflammation tightens and narrows the airways. This can trigger coughing. Like a cardiac cough, asthma can cause wheezing, but while asthma responds to inhalers, a cardiac cough doesn’t.

Here are some other key characteristics:

  • Sound and phlegm — A dry, hacking, and persistent cough
  • Key trigger — Exercise, cold air, or allergens that narrow the airways
  • Associated signs — Wheezing, chest tightness, and shortness of breath

Chronic Obstructive Pulmonary Disease

Damaged airways in chronic obstructive pulmonary disease (COPD) produce excess mucus that your body tries to clear daily. Because COPD also causes ongoing breathlessness, it’s easy to overlook a heart problem hiding behind it.

Here are some other key characteristics:

  • Sound and phlegm — A deep, chronic cough producing heavy mucus daily
  • Key trigger — Smoking or long-term lung irritants
  • Associated signs — Ongoing breathlessness and low energy

Gastroesophageal Reflux Disease

Gastroesophageal reflux disease (GERD) causes stomach acid to rise into your throat and airway, irritating the lining and triggering a cough. Unlike a cardiac cough, coughs caused by GERD are tied to meals (not simply from lying flat) and worsen after eating.

Here are some other key characteristics:

  • Sound and phlegm — A dry and nagging cough, often worse when lying down after eating
  • Key trigger — Stomach acid irritating the throat
  • Associated signs — Heartburn, sour taste, and a hoarse voice

Allergies

With allergies, postnasal drip can send mucus down the back of your throat, causing irritation and a tickly cough. It follows a pattern tied to a specific trigger, like pollen or pet dander, rather than a heart condition.

Here are some other key characteristics:

  • Sound and phlegm — Tickling, hacking, and dry
  • Key trigger — Pollen, dust, or pet dander causing mucus drip
  • Associated signs — Itchy eyes, sneezing, and a runny nose

ACE Inhibitor Medications

ACE inhibitors are heart failure medications that cause cough in some people as a side effect. The cough is dry and can be mistaken for a cardiac cough, since both are heart-related. But the cough usually resolves after stopping the medication.

Here are some other key characteristics:

  • Sound and phlegm — Persistent, nagging, and completely dry
  • Key trigger — Blood pressure and heart failure drugs causing a chemical buildup in the airways
  • Associated signs — No other cold or chest symptoms present

Other Heart Failure Symptoms

Cardiac cough is just one symptom of heart failure and other heart diseases. In fact, you may still have heart failure even if you don’t have a cough.

Here are the other symptoms of heart failure:

  • Shortness of breath — At first, you may only notice it during activity, such as climbing stairs or walking briskly. As heart failure progresses, it can happen even at rest.
  • Swelling (edema) — Fluid retention can cause noticeable swelling in your legs, ankles, feet, or abdomen, often getting worse by the end of the day.
  • Fatigue — Feeling unusually tired or worn out, even after simple tasks that never used to wear you down.
  • Orthopnea — Shortness of breath when lying flat, which may have you reaching for extra pillows or sleeping propped up just to breathe comfortably.
  • Rapid, fluid-related weight gain — Gaining a few pounds in a day or two, not from diet, but from excess fluid your body is retaining.
  • Reduced exercise tolerance — Finding that activities you used to handle easily now leave you breathless or exhausted much sooner than before.
  • Blood pressure changes — High blood pressure is a common cause of heart failure, but once your heart muscle starts struggling to pump, your blood pressure may drop.

People living with heart failure also report some unexpected symptoms, such as erectile dysfunction, jaw pain, and confusion or forgetfulness.

Diagnosis and Treatment of Cardiac Cough

To figure out whether heart failure is behind your symptoms, your doctor will start with a physical exam and a review of your medical history, listening closely to your heart and lungs.

From there, they may order tests such as an echocardiogram, electrocardiogram (ECG or EKG), chest X-ray, or blood tests to check how well your heart is pumping and whether fluid has built up in your lungs.

Treating the underlying heart problem, often with diuretics and other heart failure medications, clears fluid from your lungs and typically improves the cough along with it. If an ACE inhibitor is causing a dry cough, your doctor may switch you to a different medication.

If your cough doesn’t improve or comes back, let your healthcare provider know — you may need a change in your treatment plan.

Join the Conversation

On MyHeartDiseaseTeam, people share their experiences with heart disease, get advice, and find support from others who understand.

Did you first notice your cough before or after your heart failure diagnosis? Share your story in the comments below.

References
  1. Cardiac Cough and Cardiovascular Health: Understanding the Warning Signs — Cardiovascular Research & Training Institute, University of Utah
  2. The Interplay of Heart Failure and Lung Disease: Clinical Correlations, Mechanisms, and Therapeutic Implications — Journal of Respiratory Biology and Translational Medicine
  3. Can a Cough Be Related to Heart Issues? — Cleveland Clinic
  4. Heart Failure Symptoms — Johns Hopkins Medicine
  5. Cough: Evaluation and Management — StatPearls
  6. Pathophysiology of Cough With Angiotensin-Converting Enzyme Inhibitors: How To Explain Within-Class Differences? — European Journal of Internal Medicine
  7. Chest Cold (Acute Bronchitis) Basics — Centers for Disease Control and Prevention
  8. Asthma — Cleveland Clinic
  9. Mucus Hypersecretion in Chronic Obstructive Pulmonary Disease and Its Treatment — Mediators of Inflammation
  10. Acid Reflux and GERD — Cleveland Clinic
  11. Nasal Allergies (Rhinitis) — Asthma and Allergy Foundation of America
  12. ACEI-Induced Cough: A Review of Current Evidence and Its Practical Implications for Optimal Cardiovascular Risk Reduction — Indian Heart Journal
  13. Heart Failure Signs and Symptoms — American Heart Association
  14. Heart Failure and Erectile Dysfunction: A Review of the Current Evidence and Clinical Implications — Current Heart Failure Reports
  15. Seven Surprising Symptoms of Heart Disease — Australian Heart Foundation
  16. Heart Failure — Mayo Clinic
  17. Congestive Heart Failure — Cleveland Clinic
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A MyHeartDiseaseTeam Member

Can Heart Failure Cause Cough? This is a very informative article....Thank you

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