I spent some time reading out on the web to see if I could find something to help your itching. Didn't find much but there were a few suggestions and ideas.
First, some of the itching might be from internal scar tissue and of course from healing. Another person commented that during surgery nerves can be severed and that alone could be the source of itching while they are trying to heal. Makes sense. But when the itch is internal it's miserable since you can't get to it to relieve the irritation!!
One suggestion was to take benadryl but you might want to check with your doctor or pharmacist before you do. It might not mix well with other medications you are taking.
Another idea is to apply either hot or cold packs. It might help even if it doesn't go deep enough. Just calming down the tissue above the area might 'distract' those nerves enough to back off a bit. One thing I wondered also is the use of a TENS unit. Here's some reading ... you can see what you think.en.wikipedia.org/wiki/Transcutaneous_electrical_nerve_stimulation#Medical
Hope something here can help...
Moderator on the Fibromyalgia and Chronic Pain forums
Fibromyalgia, Insulin Dependent Diabetes. Ulcerative Colitis, Rare form of Dermatitis, Collapsed Disk, Osteoarthritis in Neck/Hands/and slowly meandering around other places....and other maladies as discovered.
It's kind of fun to do the impossible.