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What causes my leg muscles to ache when I walk up stairs?

My leg muscles ache whenever I walk up stairs or exert my legs by walking uphill. My blood oxygen level is also low. I have been on oxygen for three months and my symptoms are not as prominent on oxygen. I have had many tests run at the University of Utah including my heart, pulmonary, and vascular system. So far they do not know what is causing my symptoms. My next appointment will be the the neurological clinic. Does anyone have any suggestions?

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It might be lactic acid buildup. This happens every time someone exercises, but usually not noticable. It would probably be multiplied with a low oxygen level, so getting your oxygen level up would probably help greatly with that.

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Depending on your age, it could possibly be caused by Peripheral Artery Disease (PAD). If it continues, I would consult a physician, preferably a cardiologist.

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I would suspect something more simple - lack of exercise, causing lack of muscle mass. I don't walk as much as I used to, with an office job now, so when I do walk, my legs hurt. Especially the calves, and knees.

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Some of the possible causes are marginal artery disease, chronic exertional compartment syndrome and lumbar spinal stenosis. Its treatment may vary greatly and you should consult your physician for a diagnosis and treatment. Further information would be found on http://www.livestrong.com/article/438899-my-legs-ache-from-climbing-stairs/.

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