Answer by
LeheckaG (1826)
In Epidural-anesthesia:
Anaesthetics-and/or-analgesiacs are-injected-into spinal-canal's-outer-most-part through a-catheter.
If the needle hit something-sensitive, or was injected too-deeply or too-fast,
it could cause back-pain.
More-dangerous the-higher-up your-spine.
Your-back-pain more-likely has another-different-cause.