postherpetic neuralgia
"I had pain shooting throughout my body for a week.  One day it would be in my legs, then my torso, then my arm, my throat, my ear and then shingles surfaced on my torso-right side. I took an antiviral for the shingles, and Neurontin for pain.  The blisters were painful and they went away in a couple weeks but the pain remained and I took Neurontin in high doses, with Tylenol so I could sleep but my right leg hurt all the time.  I couldn't walk up/down stairs on that leg, or sleep on either of side without pain and I am a side sleeper so I was miserable.  A neurologist was skeptical that the cause was shingles but prescribed Lyrica and it was magic!  75 mg once a day and the pain is 95% gone, 6 months later still works."