Blisters (dysidrotic eczema) Do tell me.

Hello doctor, I am 15 years old .I have small small fluid filled blisters on my hands , in between my fingers and also in my foot. Some are reddish and some are yellowish in colour. They are very itchy. When one blister is erupted, the skin becomes teary and again another blisters comes near the old erupted one. My skin feels really itchy and scratchy. According to Google Search I have dyshidrotic eczema. I don't have any previous health problem or allergies. My face is totally clean and I don't have any blisters there. But I have some red rashes on my breast and other intimate areas.They are really rough and very itchy. I always feel scratching my skin.I have normal skin. I use Vaseline moisturizer on my hands, feet and face  and Johnson's baby  powder only on my face.Please tell me that what products(moisturizer,soap,anti itch cream) should I use to get relief from this problem and also what food to eat and what to avoid.If I need to take any medicine then please do tell me.