Pain during dwell time

The pain has gone away and you are correct it has to be the air.

I have another question. Back in Oct 2006 I had an inguinal hernia surgery.
I am now experiencing pain in the pelvic area where the surgery was done. The pain comes and go .
Placing ice in the area seems to help and so does taking tylenon. What is the cause of this pain and how do I get rid of it? An ultra sound to the area was inconclusive according to my dr.