Agreed!

Why jerks the knee, it`s a nervous TIC?

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Answer:
Knee jerks Is by far the nerves. Or you just experienced a stress, or a question in your head is spinning all the time and gives you peace of mind - it can also trigger a nervous TIC or simply a voltage that has accumulated at you for those reasons. So what you need to do is relax. Take a hot bath with soothing herbs, sea salt, lavender, chamomile, etc.
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