I had severe MP for many years following a C-section.

I finally found a remission, using Lidoderm patches. I applied 1/2 patch just below the groin area on the upper thigh near the lateral side. Daily use for about 2 weeks turned off the nerve.

There is a new OTC lotion out now that is almost as strong as a
RX Lidoderm. It is called Aspercreme Lidocaine.

Here is a website with a diagram 2B showing where this nerve is...the lateral femoral nerve:
http://www.aafp.org/afp/2000/0401/p2109.html

Apply a small amount at the spot shown in the diagram and see if you notice a change. Applying it to the thigh itself may be less effective. It is best to catch the nerve, at the groin level.
This is where doctors inject lidocaine as a test to see if this nerve is the culprit.

http://www.aspercreme.com/pain-relie...lidocaine.html
Don't use large amounts of this lotion...it is very potent and useful when used as directed on the package.