Cartilage problem?: Locking-up is a particularly worrisome symptom in the knee. I would be concerned about a torn cartilage. In the meantime, do not "force" anything, as you can cause more damage. If you lock-up again, i would recommend gently flexing and extending the knee to release any trapped tissues. Plan to see a doctor about this if the symptoms don't respond quickly to ice and anti-inflammatories.
Answered 12/9/2013
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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