When I was aprox 3 months pregnant with my first child I started feeling a spot on my right thigh which alternated between numbness and warmth. As my pregnancy progressed it got more intense until it was a constant burning sensation and quite painful.
My OBGYN insisted it was sciatica but a little research on my part told me it was not. I changed doctors and my new OBGYN sent me to a neuralogist who diagnosed it as a form of neuralgia, most likely induced by my pregnancy and scheduled an appointment to operate 3 weeks later. He cautioned that as I got bigger the nerve would be pressed on even more and might become unbearable, which is precisely what happened. Before a week had passed it had developed into a constant burning pain with bursts of sharp stabbing pain throughout the entire top of my leg. Anything touching it, clothes, water or even a breeze felt like fire.
The pain was excruciating and I lost several lbs and hadn't slept for 2 days before I finally went to a hospital emergency room asking for something to help me. The doctors on call declined to prescribe anything as it could hurt the 6 month old fetus. They sent me home and called my neurologist who said he would have to operate on me immediately.
He stripped the inflamed nerve and after several weeks of gradually diminishing pain, (thank God) I eventually lost all feeling in my upper leg and didn't regain it for several years. He told me the operation used to be quite common at the turn of the century for overwieght men with similar symtoms due to their large bellies pressing on leg nerves in the groin area (identical to pregnancy) but now it is rare. My having the problem during, and no doubt due to, pregnancy was an even rarer occasion and my operation was witnessed by several doctors and interns for training purposes.
4 years later I got pregnant again and the same thing happened although with slightly less intense pain which allowed me to bite the bullet and forgo the operation.
My leg is almost back to normal today and although it's slightly numb, it's still very sensitive to touch,.