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A member asked:
My left knee has been giving out when i have been jumping in the trampoline the past day or so and cracking a bit. is this normal for a teenager?
2 doctors weighed in across 2 answers
Not normal: "Cracking" could be normal but your knee giving out is not. Most worrisome would be that you could have injured your neck, if you forced your head position during a jump or fall.
Answered 8/12/2015
2.4k views
Cracking without: pain can be normal, but giving out while jumping or cracking with pain is not. You should see your primary care doctor and/or an orthopedist to get examined to make sure there is not a structural reason for this, such as a tear in one of the knee ligaments.
Answered 8/12/2015
2.4k views
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