Low ICP (intracranial hypotension)

Signs and symptoms

 * Headache (positional, worse sitting up)
 * Seizures (possibly)

Associated subdural hematoma
In a large database study, post-dural puncture headache in postpartum women was associated with an adjusted absolute risk increase of 130 per 100,000 deliveries in subdural hematoma (p <0.001).

Surgery
Surgical repair can correct the problem. However, it may cause rebound high-pressure headache in 27% of patients, which occurs more commonly in those patients with restricted venous outflow on MRV.