(a) Neuroaxial procedures (injections into or around spine).(1) Failure to reduce pain or worsening of pain.(2) Nerve damage including paralysis (inability to move).(3) Epidural hematoma (bleeding in or around spinal canal).(4) Infection.(5) Seizure.(6) Persistent leak of spinal fluid which may require surgery.(7) Breathing and/or heart problems including cardiac arrest (heart stops beating).(8) Loss of vision.(9) Stroke.(b) Peripheral and visceral nerve blocks and/or ablations.(1) Failure to reduce pain or worsening of pain.(2) Bleeding.(3) Nerve damage including paralysis (inability to move).(4) Infection.(5) Damage to nearby organ or structure.(6) Seizure.(c) Implantation of pain control devices.(1) Failure to reduce pain or worsening of pain.(2) Nerve damage including paralysis (inability to move).(3) Epidural hematoma (bleeding in or around spinal canal).(4) Infection.(5) Persistent leak of spinal fluid which may require surgery.