It is possible the doctor injected deeply at your red dot point.
The needle allows for penetration.

The patches work better on shallow places...so use that point as a locator but if it is over that ligament, move down a bit to the thigh.

I think repeated use of Lidocaine can turn off a nerve that was irritated, in the past. Lidocaine is a sodium channel blocker so it closes off the impulse as it moves along the nerve.

If a person had an injury, or like me a surgery that irritated it, that person may see a remission. But if the trigger or compression continues....like tight clothing or a tumor or swelling internally, success may be limited and surgery needed ultimately. I don't think EVERYONE needs surgery, but some might. I have 90% resolution...but heat will still provoke a stab now and then. Or overextension, by using exercise like a bike.
But before the patches, I had pain 24/7 and sometimes it was so bad it would stop me cold from doing anything!

I had a vertical long incision in my abdomen for my C-section because the doctors thought I had a tumor, so an exploratory was done at the same time...lots of pressure and moving things around. I had terrible ileus too, afterword, which happens when they move intestines around. That is when the nerve got compressed I think, and/or that injection of Mepergan into the thigh in recovery.