Is it true that you can use breast milk for other things other than feeding your baby? For example:…

Is it true that you can use breast milk for other things other than feeding your baby? For example: my 5-year-old some has had a quarter sized eczema patch on his body that some creams have not helped to make it go away... I was told to try putting some breast milk on it and it should clear right up.... is this for real???