<unk>  <unk>  is a complication of<unk>  of the<unk> mater (one of the membranes around the brain and spinal cord). The headache is severe and described as "searing and spreading like hot metal", involving the back and front of the head and spreading to the neck and shoulders, sometimes involving neck stiffness. It is exacerbated by movement and sitting or standing and is relieved to some degree by lying down. Nausea, vomiting, pain in arms and legs, hearing loss, tinnitus, vertigo, dizziness and paraesthesia of the scalp are also common.<unk>  is a common side effect of lumbar<unk>  and spinal anesthesia. Leakage of cerebrospinal fluid causes reduced fluid levels in the brain and spinal cord. Onset occurs within two days in 66% of cases and three days in 90%. It occurs so rarely immediately after<unk>  that other possible causes should be investigated when it does. Using a pencil point rather than a cutting spinal needle decreases the risk. The size of the pencil point needle does not appear to make a difference.<unk>  is estimated to occur in between 0.1% and 36% people following<unk><unk> .
Post-dural-puncture headache
External compression headache
Acephalgic migraine
Mixed tension migraine
Cold-stimulus headache
Tension headache
Red wine headache
Lupus headache