Eczema Treatment Care

Our daughter has bad eczema, and her primary doctor thinks it’s contact dermatitis. It’s on her elbows and arms, sides of her legs and knees, and her cheeks. However, I fed her squash for the first time today, and now she’s got a rash on her butt and a little on her chest and stomach (in addition to what she already has). I can’t think of anything she could have come into contact with today that would cause a rash on her butt or stomach. We haven’t changed diapers, wipes, diaper cream, or laundry detergent for her (Dreft only). Is this more than likely a reaction to squash? Any personal anecdotes or general knowledge about allergies and eczema are greatly appreciated. She’s only 5 months old, so seeing an allergist won’t do much good yet (so I’ve been told). Thanks!

i suffer from contact dermatitis on my feet and allergy testing has shown i am allergic to leather and a rubber called mercaptobenzothiazole (MBT), so i need to find shoes that don’t contain either of these things.
impossible so far!!!
i’ve tried clarks, scholls and they contain mbt
any help appreciated!!
thanks