Allergic to losing weight? Can anyone explain this?

Hi y’all! So I’ve been struggling with losing weight for the past few years, mainly because every time I start eating healthy whole unprocessed food and cut out refined carbohydrates I break out in this itchy rashes and eczema all over my torso, arms, neck and scalp. As soon as I start eating anything it calms down.

I did Keto for a few months and lost a ton of weight but this rash showed up and I have a hunch it’s related to the breakdown of fat or something?? Maybe some kind of chemical reaction? I have no idea...

I am now three weeks into cutting out all processed carbohydrates and eating mainly veggies, lean meats and healthy fats and occasionally fruit and this is what I’m experiencing. The rash is all over my back and torso and under boobs as well.

Any ideas??