Fatigue is a common yet complex condition characterized by a persistent sense of tiredness or exhaustion. It can significantly impact daily life and is not simply resolved by rest or sleep. This page aims to provide a detailed understanding of fatigue, including its potential causes and implications.

Definition of Fatigue

Fatigue is a state of mental and/or physical exhaustion that reduces one’s ability to perform work effectively. It can manifest as a lack of energy, tiredness, or weariness and can be acute (short-term) or chronic (long-lasting). Unlike regular tiredness, fatigue is often not relieved by rest alone.

Are you experiencing fatigue?

Schedule a checkup with an expert cardiologist and get piece of mind.
AFib America offers appointments in Houston, TX.
Please call our office for more details.

Causes of Fatigue

The causes of fatigue are numerous and can be categorized into lifestyle factors, medical conditions, and psychological issues.

Lifestyle Factors:

  • Poor sleep habits: Lack of quality sleep leads to fatigue.
  • Physical overexertion: Excessive physical activity without adequate rest.
  • Unhealthy diet: Poor nutrition can contribute to chronic tiredness.
  • Alcohol and drug use: These substances can disrupt sleep patterns and lead to fatigue.

Medical Conditions:

  • Anemia: Low levels of red blood cells causing chronic tiredness.
  • Thyroid disorders: Both hypothyroidism and hyperthyroidism can cause fatigue.
  • Diabetes: Fluctuating blood sugar levels can lead to exhaustion.
  • Heart disease: Reduced heart function can result in decreased energy levels.
  • Chronic Fatigue Syndrome (CFS): A complex disorder characterized by extreme fatigue.
  • Sleep disorders: Conditions like insomnia and sleep apnea disrupt normal sleep, leading to fatigue.

Psychological Causes:

  • Depression: Often has a significant symptom of fatigue.
  • Anxiety: Persistent worry can be exhausting and lead to chronic fatigue.
  • Stress: Prolonged stress can deplete energy levels.

When to Seek Medical Attention

Fatigue can be a symptom of an underlying health issue. It is advisable to consult a healthcare provider if:

  • Fatigue persists for an extended period (more than a few weeks)
  • It is accompanied by other unexplained symptoms like weight loss, fever, or pain
  • It significantly impacts daily life and activities



Fatigue is a multifaceted issue that can stem from various sources, ranging from lifestyle habits to serious health conditions. It’s important to pay attention to fatigue, especially when it is persistent, and to seek medical advice for proper diagnosis and treatment. Understanding and addressing the underlying causes of fatigue is essential for improving quality of life and overall health.

If you are experiencing fatigue, it is highly advisable that you consult with a cardiologist for a more precise diagnosis.

Schedule Appointment

    This appointment is for

    Skip to content