Is there a natural organic herbal remedy to treat eczema on a 3 year old?

My sister turned to organic coconut oil for my nephew. He was born with serious eczema issues. He had to be careful with what he ate otherwise the eczema would be v bad. There are many brands in the market and there is even lotion form. It has proven to relieve eczema fast and my sister has been using for my nephew since 2 yo and now he is 5. You can check this website out. http://wellnessmama.com/5734/101-uses-for-coconut-oil/

I bought organic virgin coconut oil and it doesn't work for my girl at all