Blood oximetry at 73% is generally not good news. It points to a problem with ur lung or heart. Were u ever a smoker? That cd explain breathing & back problems. U may have chronic obstructive pulmonary disease (COPD) which comes from yrs of smoking. See ur doctor quickly to get diagnosed. While COPD damage cannot be reversed, ur symptoms can b treated w/ inhalers, & oximetry improved. Don't smoke!
Answered Aug 28, 2015
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