Cerebrospinal fluid leak

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A cerebrospinal fluid leak (CSFL) is a medical condition where the cerebrospinal fluid in the brain leaks out of the dura mater.[1][2] This can be due to a spontaneous cerebrospinal fluid leak or result from different causes such as a lumbar puncture or physical trauma. While high CSF pressure can make lying down unbearable, low CSF pressure due to a leak is often relieved somewhat by lying flat on the back.[citation needed]