I have been plagued by a rash along the insides of my fore-arms for several years. I saw a dermatologist who said it was due to extra-dry skin and told me to use lotion after my showers. (This didn’t work.)
Strangely enough, about a week after discovering I was pregnant, my rash disappeared. I had been a real Diet Coke junkie and vowed to stop during my pregnancy. When the baby was about 3 weeks old, I had my first diet soda in 10 months. Within hours, my rash returned. It took a little testing to confirm my theory, but now I am certain. Anytime I have been rash-free for weeks, if I drink a diet soda or have a “lite” cup of yogurt with Aspartame, the rash is back the next morning.