I've been reading a bit about PCS, inflammation, and the endocrine system. Especially about possible connections between testosterone and PCS. It then struck me that the vast majority of people who report sensitivity to bumps here are young men -- and all but one that I know of have been men.

If there is real a correlation here, it might suggest a link between some dysfunction of the male sex hormones and sensitivity to bumps. I think it would be interesting to (informally, unscientifically) confirm this suspicion. Thus, I'm hoping that some people with sensitivity to bumps might report in with their sex and age of onset of sensitivity to bumps.