Nicky,
stuff infection on a skin can be dangerous, but in most cases is not a life thretining condition (usually it's a boil).
But in your case it can be very DANGEROUS. I will explain to you.
After you had spinal problem, especially if you ever had a spinal surgery, tissue around that area becomes weak and let's say not a healthy one. From than on - it's a weak spot in our bodies.
If you watched the last episode of ER on TLC, they showed a young man who got stuff infection under his arm (boil). Boil drained by itself, but infection traveled to his spine (he had previously injury in there) and set up causing this poor man paralysis of his low extremedies.
Drs couldn't understand what is goin on; it took a long scary time for them to find out the cause and what this was? Stuff infection in his spine.
They treated him (thank God it was on time) and his is OK now. But if they wouldn't find out - he could die or left paralysed.
My surgery was done at HSS in NYC by a very "big" Dr Camissa. He told me from now on when I have dental work or any other surgeries, infections, common cold - I have to take antibiotics. And all his patients after spinal fusions have to do this.
I tell you this only because seems to me you don't know much about it and don't understand how bad it can get.
I really worry about you. The hole you have - it can be infection inside the insision. Please, girl, hurry up and see somebody!!!!