It sounds like a Viral Rash. I get them EVERYTIME I am sick. It could be something serious so you should get it checked out, BUT I have nothing wrong with me and just get it when I get sick. It sucks and does itch but if it is the same thing {Viral Rash} it will go away about a week after you get better. Hot baths will SEVERELY irritate it more!!! Just do cool baths or showers and use lots of hydrocortizone cream on it. The worst thing about it is that it will get kind of rough and dry after it starts to heal. So like I said get it checked out, but it sounds excactly like what I have. Good luck.
S.
Hi,
This may be a rash presented by an underlying bacterial or viral infection. Viral exanthems may be due to Ebstein Barr virus, enteroviruses, and measles. The rash of scarlet fever may be itchy and appear primarily in the chest and trunk.Drug allergies may present as rash.Another rash of unknown cause is pityriasis rosea which may involve the extremities and innner arms and thighs.
I suggest you seek consult with your internist or dermatologist. I have just given a run down of possible differentials that you may discuss with your physician. Most of these may be diferentiated from one another based on a complete physical examination.
keep us posted.Good Luck!