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What Are the Signs of an Unhealthy Heart? 8 Warning Signs to Know

Dr. Prashant Dwivedi 27 August 2025 7 min read
Learn the common signs of an unhealthy heart, including chest discomfort, shortness of breath, fatigue, palpitations, swelling, dizziness and nausea. Know when these symptoms need medical attention and how to protect your heart health.

What Are the Signs of an Unhealthy Heart?

Your heart works continuously to circulate blood and oxygen throughout your body. Sometimes, changes in how you feel can provide an important reason to pay attention to your cardiovascular health. Symptoms such as chest discomfort, shortness of breath, unusual fatigue, palpitations or swelling can have several causes, but some may be associated with heart conditions.

Recognizing potential warning signs early can help you seek appropriate medical evaluation instead of dismissing symptoms as stress, tiredness or indigestion.

Introduction: Why You Should Pay Attention to Heart Health

Heart-related conditions do not always begin with dramatic symptoms. Some people may notice gradual changes such as reduced exercise tolerance, persistent tiredness or breathlessness during everyday activities. Others may experience more obvious symptoms such as chest pressure, an irregular heartbeat or swelling in the legs.

Not every symptom means that you have heart disease. However, persistent, recurring or unexplained symptoms should be discussed with a healthcare professional. Some symptoms, particularly those associated with a possible heart attack, require immediate medical attention.

8 Signs of an Unhealthy Heart You Should Know

1. Chest Discomfort or Pain

Chest discomfort is one of the important warning signs associated with certain heart conditions. It may feel like pressure, squeezing, fullness, heaviness or pain in the center of the chest. Heart-attack symptoms can sometimes begin gradually and may come and go rather than causing sudden severe pain.

Chest discomfort can also have non-cardiac causes, including digestive or muscular problems. However, new or unexplained chest discomfort should not be ignored, especially when it occurs with shortness of breath, sweating, nausea, dizziness or discomfort spreading to the arm, back, neck, jaw or stomach.

2. Shortness of Breath

Feeling unusually breathless during routine activities, such as walking or climbing stairs, can be a sign that deserves medical attention. Shortness of breath can occur with several conditions, including heart and lung problems.

In heart failure, breathlessness may initially occur during physical activity and can become more noticeable as the condition progresses. Some people may also experience breathing difficulty when lying down.

3. Irregular Heartbeat or Palpitations

Palpitations can feel like your heart is racing, fluttering, pounding or skipping a beat. Occasional palpitations can occur because of stress, anxiety, caffeine or other factors and are not always a sign of heart disease.

However, frequent, prolonged or new palpitations deserve evaluation, particularly when they occur with chest pain, shortness of breath, dizziness or fainting. Some abnormal heart rhythms, including atrial fibrillation, may require medical assessment and treatment.

4. Unusual Fatigue or Weakness

Persistent or unexplained fatigue can sometimes be associated with cardiovascular problems. Heart failure, for example, may cause tiredness and reduced ability to perform normal physical activities.

Fatigue has many possible causes, including poor sleep, anemia, thyroid problems, infections and stress. If unusual tiredness continues or is accompanied by breathlessness, chest discomfort or reduced exercise tolerance, speak with a healthcare professional.

5. Swelling in the Legs, Ankles or Feet

Swelling in the lower legs, ankles or feet can occur when fluid builds up in the body. This can be one of the symptoms associated with heart failure, particularly when it occurs along with breathlessness, fatigue or rapid weight gain.

However, leg swelling can also have other causes. Persistent or unexplained swelling should therefore be evaluated rather than assumed to be a heart problem.

6. Dizziness, Lightheadedness or Fainting

Feeling dizzy or lightheaded can happen for many reasons, including dehydration, low blood pressure, medication effects and changes in heart rhythm.

When dizziness or fainting occurs with palpitations, chest discomfort or shortness of breath, prompt medical assessment is important because certain heart rhythm problems can cause these symptoms.

7. Persistent Cough or Wheezing

A persistent cough or wheezing can have many causes, including respiratory conditions. In some people with heart failure, fluid can build up in or around the lungs and contribute to coughing or breathing difficulties.

A cough that produces pink or blood-tinged, frothy mucus, especially when accompanied by significant breathlessness, requires urgent medical attention.

8. Nausea, Loss of Appetite or Stomach Discomfort

Nausea, vomiting or stomach discomfort can sometimes occur with heart problems. These symptoms may be particularly important when they occur together with chest discomfort, shortness of breath, sweating, unusual tiredness or dizziness.

Heart-attack symptoms can vary from person to person. Women may also experience symptoms such as nausea, shortness of breath, unusual tiredness or discomfort in the back, shoulder or arm.

When Should You See a Cardiologist?

Having one of these symptoms does not automatically mean that you have heart disease. However, recurring, unexplained or worsening symptoms should be medically evaluated.

1. Symptoms Keep Returning

If you repeatedly experience breathlessness, unusual fatigue, palpitations, dizziness or swelling, schedule a medical evaluation. Keeping track of when symptoms occur and what activities trigger them can help your doctor understand the problem.

2. You Have a Family History of Heart Disease

A family history of cardiovascular disease can be an important part of your overall risk assessment. Discuss your family history with your healthcare professional so that appropriate preventive measures and screenings can be considered.

3. You Have High Blood Pressure or High Cholesterol

High blood pressure and unhealthy cholesterol levels are important cardiovascular risk factors. Regular monitoring and appropriate management can help reduce cardiovascular risk.

4. You Have Diabetes or Prediabetes

Diabetes is an important risk factor for cardiovascular disease. Blood sugar, blood pressure and cholesterol should be monitored as part of an overall approach to cardiovascular health.

5. You Smoke or Have Other Lifestyle Risk Factors

Tobacco use, physical inactivity, an unhealthy diet and certain other lifestyle factors can increase cardiovascular risk. Making sustainable changes and discussing your individual risk factors with a healthcare professional can support better heart health.

6. You Are Unsure Whether Symptoms Are Anxiety or a Heart Problem

Anxiety and stress can cause symptoms such as a racing heartbeat, chest discomfort or breathlessness. However, it is not always possible to distinguish anxiety from a heart condition based only on symptoms.

If symptoms are new, severe, persistent or concerning, medical evaluation is the safest approach.

When Is a Heart Symptom an Emergency?

Some symptoms require immediate emergency medical care. Seek emergency help if you experience chest discomfort or pressure that lasts more than a few minutes or keeps returning, particularly when it occurs with shortness of breath, sweating, nausea, light headedness or discomfort in the arm, back, neck, jaw or stomach.

Do not wait for symptoms to become severe before seeking emergency care. Heart-attack symptoms can sometimes start mildly and become worse over time.

How Can You Support a Healthy Heart?

Heart health is influenced by several factors, including blood pressure, cholesterol, blood sugar, physical activity, tobacco use, diet, weight and family history.

Stay physically active: Aim for regular moderate-intensity physical activity as recommended for your individual health status.

Choose a heart-friendly diet: Include vegetables, fruits, whole grains, legumes, nuts, lean proteins and healthier unsaturated fats.

Avoid tobacco: Smoking and tobacco exposure can damage blood vessels and increase cardiovascular risk.

Monitor blood pressure and cholesterol: Regular checks can help identify important cardiovascular risk factors.

Manage diabetes: Keeping blood sugar within the target range recommended by your healthcare professional can help protect cardiovascular health.

Maintain a healthy weight: A healthy weight can support blood pressure, cholesterol and overall cardiovascular health.

Manage stress and sleep: Healthy sleep habits and effective stress-management strategies can support overall health.

You Can Also Read

 Silent Heart Attack: Causes, Symptoms, Risk Factors, and How to Prevent It 

 10 Reasons Why Swimming Is Great for Heart Health 

 Conclusion: Don't Ignore Changes in Your Heart Health

Symptoms such as chest discomfort, shortness of breath, unusual fatigue, palpitations, swelling, dizziness and nausea can have many different causes. Some, however, may indicate an underlying cardiovascular problem and deserve timely medical evaluation.

The key is not to self-diagnose but to recognize persistent or concerning changes and discuss them with a qualified healthcare professional. Early evaluation can help identify cardiovascular risk factors and appropriate treatment when needed.

If you experience symptoms that could indicate a heart attack, seek emergency medical care immediately rather than waiting for them to disappear.

Dr. Prashant Dwivedi 
Consult a Cardiologist in Jaipur

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Dr. Prashant Dwivedi

Dr. Prashant Dwivedi

Interventional and Structural Heart Cardiologist with expertise in TAVR, TMVR, MitraClip and advanced cardiac procedures.

Frequently asked questions

General information related to this topic. Individual treatment advice may differ.

Common warning signs can include chest discomfort, shortness of breath, unusual fatigue, heart palpitations, swelling in the legs or ankles, dizziness, persistent cough and nausea. These symptoms can have causes other than heart disease, so persistent or concerning symptoms should be evaluated by a healthcare professional.

Yes. Shortness of breath can occur with certain heart conditions, including heart failure, particularly during physical activity or sometimes while lying down. However, lung conditions and other health problems can also cause breathlessness. New or worsening shortness of breath should be medically evaluated.

Seek emergency medical help for new or unexplained chest pressure, squeezing, fullness or pain, especially when it lasts for several minutes, returns, or occurs with shortness of breath, sweating, nausea, lightheadedness or pain in the arm, back, neck, jaw or stomach.

You can support heart health by staying physically active, eating a balanced heart-friendly diet, avoiding tobacco, maintaining a healthy weight and managing blood pressure, cholesterol and diabetes. Regular discussions with a healthcare professional can help you understand and manage your individual cardiovascular risk.
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