Lidoderm patches work well for this. That is the only drug I used for it. Mine came from C-section surgery. I've had it for over 25 yrs.

At one point it was horrible. But I found hot temps/hot showers, hot baths,
hot steam rooms really set it off. After using lidoderms on my thigh up high where the nerve exits the abdomen, put it to sleep after 14 days use.

Now I only have numbness and some twinges. Tight clothing and carrying your wallet in the back hip pocket on that side will make it worse. Tight jeans are a no no.

Here is an article to help explain it:
http://www.aafp.org/afp/20000401/2109.html
It can be confused with other problems.

MP is discussed here briefly...near the bottom of the page:
http://www.aan.com/familypractice/html/chp9.htm
There are nutritional things you can do. Vit B12, and fish oil, often help with nerve repair. But keeping stress off the nerve where it is entrapped is necessary for repair.