Large red rash and tiny circular others on the back of legs

About two months ago, i noticed a red, medium sized rash on the back of my right leg.  At this time the rash did not itch.  I thought it was maybe because of the use of Tide detergent and i immediatly stopped, however now both my legs have this rash, and its very itchy at times.  I notice that right when I get out of the shower that the rash on both my legs becomes maybe irritated and turns bright red, i have included pictures within this post for you to view if you dont mind.  I have never had skin problems before, and i have recently noticed that there are similar red spots on my scalp, which you really can see after i exit the shower. The rash seems to be spreading, so to speak.  Any help that you can give me would be highly appreciated.  the four links below are four different pictures, thanks.

http://viewmorepics.myspace.com/index.cfm?fuseaction=viewImage&friendID=68087776&albumID=2665631&imageID=44321654

http://viewmorepics.myspace.com/index.cfm?fuseaction=viewImage&friendID=68087776&albumID=2665631&imageID=44321655

http://viewmorepics.myspace.com/index.cfm?fuseaction=viewImage&friendID=68087776&albumID=2665631&imageID=44321656

http://viewmorepics.myspace.com/index.cfm?fuseaction=viewImage&friendID=68087776&albumID=2665631&imageID=44321657

http://viewmorepics.myspace.com/index.cfm?fuseaction=viewImage&friendID=68087776&albumID=2665631&imageID=44321654