my mum was diagnosed with arachnoiditis 7 yrs ago. recently the pain has got alot worse where can neither sit stand or lie down for long periods of time. she takes constant oramorph. she has now developed an extremely painful seethrough indentation at the bottom of her spine extremely sensitive to touch and when is touched gives radiating pain all through her body. she is also now losing control of her bowels what is happening to her please and what is this hole in her back. thankyou