Psoriasis on kid

My daughter was diagnosed with Psoriasis at age 3 and at first I thought it was allergies until I found out it was psoriasis. She had it all over her body as well as her scalp and I was told to use the gel shampoo and some other prescription creams but it didn’t help. I went on forums and blogs and found that most people say their diet and natural remedies worked. I started on the diet and cut out dairy and meat from her diet. I then went on to olive oil and tea tree and glycerin and a few others and still it only increased. Any advice on what to do? Tweet