Yes she would bite me if I touched her back or her tail. But she did it a spastic way, if I can try and explain, like some sort of seizure response, and not out of meaness. They can be (I found out after getting bit and doing some research) when you touch them, they can feel actual pain. They put her on amnitriptylene, Paxil, clomipramine, zoloft and diazepam, trying to stop the behavior, and slow her hallucinations. She was constantly attacking her tail and anal area, she would bolt out of of the house and start running in the yard in circles smaller and smaller until she would drop panting in a heap. We tried every way we could think of to break the "trances" (my word for how she would get) It is similar, one specialist told me, to having an autistic child with OCD. She never ran fevers, but the seizures began a few months after I finally figured out what was wrong with her. The vets in my area had never heard about Feline Hyperesthesia until I started reseaching on my own over the internet to find out what was wrong with my cat.
I wrote an article about it after she passed away. It's on site here, you can look up through the internal search engine on the website (not the forum) feline hyperesthesia to find it.
I wish you the best of luck, if your cat indeed has this.And a better outcome than we experienced with it.