Allergic to Body Excretions?

My poor little girl. I think she is allergic to her body excretions in general. As a baby, I had to change her within 5 minutes of a poopy diaper or she would start to get welts on her rear. She would turn pink-faced right away with drool and easily developed drool rash (it just seemed to appear out of nowhere after a little drool.) Now, check out her face. She has had an awful runny nose for over a week now. She is having a hard time shaking this head cold. She has been taking 3 hour naps, and today was no exception. It was actually closer to 3.5 hours today.

She has this scabby sore nose, but this morning she woke up with a rash on her face (right under some dried snot). I am sure she wiped her nose a couple times and spread it all over her face and it sat on her face and caused a reaction. There are no bumps anywhere else on her body. I put some hydrocortisone on it this afternoon, so we'll see if that helps.