Hi Raquel,
Cortizone creams can thin the skin. I would not use them regularly. I would try raw virgin coconut oil instead. Skin problems in my family are many. My twin has psoriasis. My other sister has had lifelong severe eczema. One thing she says is that the docs told my mom to not bath her much. She has found now that bathing in water actually HELPS the skin. So DON'T cut down on water baths, just the soaps. I had scalp/ear psoriasis when I was young. Come to find that vitamin deficiencies and milk intolerance was to blame for that.
I would try to combat it internally. My DD was born with thrush , an internal fungus. A few months later her pedi said she had the worst case of eczema he had seen in a long time. By the time she was 11 months old she had none.
Combating internal fungals issues and eliminating food allergies are your best bets. The skin is our largest DETOX organ. You can combat internal fungus by giving RAW virgin coconut oil, by the teaspoon full, twice a day. Caprylic acid is also a fungicide. Open the caps and put it in plain yogurt. See if you can get on nystatin drops.(totally safe).
Soy is bad. DO NOT use soy formula. There is proof now that giving soy formula is equivalent to giving a baby 5 birth control pills a day. The excess estrogen can cause future fertility problems for the child, future cancer, and thyroid problems and the diseases that come with it (chronic fatigue, arthritis, low blood pressure and black outs, etc) I fed my DD soy back in the 90's and now she has thyroid issues and arthritis- at 12 years old.
A GLUTEN free diet is WORTHY of trying. Also the vitamins that help the skin are vit A, and vit B complex. Use b complex drops under the tounge.