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A 26-year-old female asked:

Why do my knees ache every time i start running or walk down the stairs?

3 doctor answers6 doctors weighed in
Dr. Harris Cohen
Family Medicine 22 years experience
Knee pain: There are many causes of knee pain -- what you are describing sounds like arthritic pain (depends on your age) and is best evaluated by your primary care doctor. Exam +/- imaging will be helpful in diagnosis.
Dr. Harris Cohen
Family Medicine 22 years experience
Provided original answer
Arthritis is less likely at 26 (unless you have a history of trauma) -- a thorough history and exam will be helpful for you.
Feb 23, 2012
Dr. Ahmad M Hadied
Orthopedic Surgery 50 years experience
Chodromalacia: When you up and the steps a lot of stress applied to the joint between the knee cap and femur, so any problem in that joint show on those motion because they go are stress and also in squatting.
Dr. Gregg Albers
Addiction Medicine 42 years experience
Knee Pain: If you are younger, some cartilage damage, with motion under stress such as running and stairs, or tendonitis is more likely. As you get older, and the more you have used your knees for athletic pursuits, the cartilage can wear thin, and the bone can rub on bone, osteoarthritis. Orthopedist, with x-rays, mri, and a arthroscope can let you know, what the damage is, and how to improve the problem.

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