OMG, when you say "hole", do you mean the skin is open and he can see in there??? Or is it more of an indented area??? Either way you should see a doc, but it the skin is open you better get to the ER right away.
My heart and prayers go out to you, Nikki...I pray that this condition is something that the doctors can easily fix so that you can continue to have a pain free life. Please continue to keep us all updated!