Hi Nonuser,
Welcome to the Pain Management Forum.
There are multiple theories and studies on this issue. It is general belief that opiates do increase your pain sensations and tell you that you still need the drug when you don't, especially when you stop taking the opiate. These pain signals come from our brain's Pain Center.There are some names for this condition, one is Rebound Pain and another is Analgesia/Pain Syndrome. I could go into the philosophy but it sounds like you have some insight into this Syndrome.
However after 120 days I would think that what you are feeling is real pain. You may find additional information and suggestions from our Substance Abuse Forum. You are always welcome here but you may also want to post there. Here's the link:
http://www.medhelp.org/forums/Addiction-Substance-Abuse/show/77
Please don't think I am suggesting you are an Addict or an Abuser, far from it. I am just trying to help you obtain additional input. The Pain Center will usually keep emitting these signals for weeks, maybe a month but after 120 days I think that you are experiencing true pain.
I don't know your situation, past or present. You are more then welcome to share this with us.... it may help us, help you.
I'll look forward to hearing from you soon. Best of luck and please take care.
Peace,
~Tuck