Eczema Treatment Care

I never had on my hands or anywhere else BUT the inner part of my legs. Its not inflammed or blistery or anything. And it doesnt effect anything at all. Its just there. I havent seen a doctor in awhile so I cant really say that my doctor has told me I have eczema but its just common scense. My recruiter already made an appointment for MEPS next week so any answers would be helpful.

I get these tiny red spots from time to time without rhyme or reason? If its contact dermatitis which the dr thought it might be then why do they come at strange times, like vacuuming, walking, after a shower, sitting outside one time I put on some black jeans started iching and sure enough i had tons of tiny little red spots.
there is no correlation to these events or anything I have been in contact with at all those times?They go away after I spray them with cortisone or benadryl
what could i be allergic to, or could dry skin cause it????????