I have a rash in the back of my neck on hairline and on scalp. They are painful water filled like bumps that when scratched enough and drain they scab and dry up. They come back all the time and seem to be more prevalent on hairline. I also have on my shins on both legs a rash that itches all the time and when I itch sometimes they bleed, now I notice a rash between the penis and the scrotum that itches like mad and even when I itch it there is no relief. Are all these connected?