No: Masturbation should not cause back pain or knee pain. Those symptoms should be investigated by your family physician to at your age, rule out among other things a sprained back, a sprained knee or something else.
Answered 3/28/2014
4.3k views
Shouldn't be related: Unless you are using some awkward position.
Answered 3/28/2014
4.3k views
A doctor has provided 1 answer
A doctor has provided 1 answer
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