[Jack_]

I sometimes get this weird itchy/tingling sensation on my skin, mainly around the back, shoulder and neck area but also on my arms sometimes too. It happens generally when I'm in the shower, and can last for a few minutes, and it usually goes after I've left the shower. It happens most days whilst I'm in there, and has on a few occasions happened during the day while out and about.

I did itch it once and everywhere I scratched came up in red spot like marks, which disappeared after half an hour or so, so I haven't scratched them again.

It has been happening for a couple of months now and I've been wondering what it is and how I could stop it. Does anyone know what it could be?