Shortness of breath, or breathlessness, is the feeling that the body is not getting enough air. It can show up as rapid breathing, chest tightness, or the need to stop and catch one’s breath after mild effort.
In healthy individuals, the heart and lungs work together smoothly. When activity increases, oxygen demand rises, and the body adjusts. But when this system is not functioning at its best, even small tasks begin to feel exhausting.
This is not just about lungs. In many cases, it is a sign that the heart, blood vessels, or overall fitness level is struggling to keep up.