what is that?

Last night in the space of about ten minutes Miss Biscuit went from having completely fine skin to having this sort of rash on her torso. She says it doesn't itch too much but I suspect it is allergic eczema. Maybe. Hopefully. She had been running around naked for about five minutes before bed and then she had put on her dressing gown and suddenly complained about feeling itchy. I had a look at her and her torso was mildly rashy. Nothing else. Maybe it was a reaction to cat dander? The cat likes to try and sleep everywhere. (though it has never bothered her before.) I changed the sheets/bed clothes on her bed. (tossed the dressing gown in the wash) Then I helped her put clean pajamas, and thought it might go away. Today it hasn't really bothered her until bed time when she felt slightly itchy on her back. No sign of bugs or anything. We use super sensitive laundry soap. Nothing out of the ordinary in her diet. The only other thing I can think of was that she was out in the garden. (and it was pretty sunny.) I hope it goes away soon. I may call the GP tomorrow or something to see if they can suggest a cream.

She isn't an itchy kid for the most part. I admit I worry about this because a lot of my family members have skin issues of one kind or another. (I just have psoriasis) I don't wish it on anyone.