Self-care

Don't smoke, and avoid secondhand smoke, areas with high air pollution, and elevations over 5,000 feet. Losing weight and exercising regularly can help.

When to seek immediate medical care

See a doctor immediately if:

• Sudden and severe
• Occurs at rest
• Chest pain, cold sweats, fainting, or nausea
• Blue tinge to lips or fingers
• Can't work or complete daily tasks

When to make a doctor's appointment

Make an appointment to see a doctor if:

• Swelling in ankles and feet
• Wheezing
• Fever and cough
• Worsens when lying flat