Symptoms and Side Effects

Shortness of Breath

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Feeling Short of Breath

Feeling short of breath can be scary—and it’s something many people experience during cancer treatment. Whether it’s caused by the treatments themselves, anxiety, or an underlying health issue, it’s important to pay attention to any changes in your breathing. Some causes are mild and manageable, while others may need medical attention.

If you’re unsure what’s causing your symptoms, reach out. Your care team can help uncover the source and offer treatments to help you feel more comfortable.

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What Can Cause Shortness of Breath?

There are many possible reasons for shortness of breath during treatment, including:

  • Anemia
  • Physical activity or exertion
  • Lung issues, like infections (such as pneumonia) or blood clots
  • Heart problems
  • Anxiety
  • Side effects from cancer medications

How to Care for Yourself at Home

  • Avoid smoking and secondhand smoke. Ask your care team about support programs if you want to quit.
  • Take your medications exactly as prescribed, including oxygen if recommended.
  • Find ways to reduce stress and anxiety—like meditation, breathing exercises, posture correction, or gentle distractions (reading, music, etc.).

Treatment Options

Your cancer care team may recommend either one or more of the following depending on the cause:

Preventing Sudden Attacks of Breathlessness

Try to identify what triggers your shortness of breath and take steps to reduce those triggers:

When to Call for Help

Let your care team know right away if you experience any of the following:

  • New or worsening shortness of breath
  • Trouble breathing with light activity or at rest
  • Shortness of breath that worsens when lying down
  • A history of blood clots, especially with new symptoms
  • Chest pain
  • Dizziness, weakness, or confusion
  • Coughing up blood or mucus