Shortness of Breath: Causes, Chest Pain & Health Risks

What causes shortness of breath when walking, biking, or lying down? From low blood oxygen levels to vitamin insufficiencies, identifying the triggers for respiratory distress in teens and the elderly is essential.

Causes of Shortness of Breath When Lying Down

Published Aug,14 2017 | By Lori Newell

Shortness of breath while laying down -- a symptom medical professionals call orthopnea -- is concerning as it often suggests the presence of a serious underlying disease. Orthopnea can result from disorders of the heart, lungs and gastrointestinal system. It can also occur with obesity.