--post vaccine neuropathy falls into the "molecular-mimicry" category of autoimmune neuropathies. The body mounts an immune response to the introduced vaccination pathogen, but it happens to have a molecular structure similar to some component of nerve, and the now activated immune system attacks the "similarly shaped" nerve structures as well as the pathogen.

These neuropathies can "burn themselves out"--be "monophasic"--in that once the offending pathogen is eliminated from the body--and, unfortunately, once a lot of the similarly structured nerve tissue has been "eliminated"--the immune response dies down. Of course, one can have terrible symptoms during the "active" phase, and even during after, depending on how much damage has been done to the nerves, and how much of it the body can repair.

There's not a lot of literature out there on this phenomenon; there's more about post-infectious neuropathies that may have a similar mechanism. Take a look at:

http://www.ncbi.nlm.nih.gov/pubmed/19808027

http://www.ncbi.nlm.nih.gov/pubmed/7477751

http://www.ncbi.nlm.nih.gov/pubmed/21955390

http://www.ncbi.nlm.nih.gov/pubmed/8685108

http://jnnp.bmj.com/content/75/10/1507.full

A lot of this has gotten caught up in the whole vaccination/autism debate, and so comments from various self-help/self-report boards--even this one, should be read with an eye open to whatever agendas may be extant. I'm not saying this is not an actual phenomenon, but evidence that it is widespread/common seem to be lacking.