HI Faith. I just don't know. My atrophied hand caused no pain at all...and my legs are apparently both atrophied (I didn't know) and also have no pain in those muscles other then when they were in a state of spasm. But remember, I have mostly upper motor neuron issues myself other than in my hands and abdominal region--and for me, the LMN stuff doesn't hurt--until it spasms--and when i overdo. Unfortunately, you use your legs all the time, so yes, my legs can hurt--but not specifically in the muscles that are going. Make sense? WHO said you needed to see the neuro again? If it's just one muscle--it's possible it's trapped somewhere behind the knee or something. Doesn't have to be the spine itself.