hi.. yeah i have skin asthma too... I first had it when i was still in highschool... i went to a derma then the doc told me these w/c i folled and got me cured:
-use dove unscented soap or use baby soaps

-moisturize often...

-put lotion right after taking a bath... cetaphil or mild lotions only

-use facial moisturizers with spf's

-avoid foods like chicken, crabs, shrimps, egg (food alergens)

-DO NOT expose yourself into a direct sunlight (very important)... This can dry your skin w/c can make your skin ithcy again...

-dont scratch your skin when its itchy, put lotion instead....

I guess thats just it... That cured me but now I got it again.... I graduated college already. I first had it on 1998... now i have it again (2008).... yeah ten years after.... it usually attacks on summer, base on my own observation coz its too hot... plus i thought im already immuned to chicken and the food alergens that I ate them again... stupid me... so just try those tips... hope it might help...