Hi,
There is no definite cure for eczema but its recurrence may be easily controlled. Dishydrotic eczema is initiated by an itch scratch cycle that leads to eruption of lesions ( which usually contains a clear fluid ) and thus may eventually present with an excoriated or weeping lesion.
Topical steroids of moderate and high potency may be used. Also avoiding direct contact with possible irritants may be able to help. Wearing protective hand gears while working will be beneficial. Use only mild and bland soaps when washing your hands. The use of gentle creams at the end of the day may help moisten the skin and prevent drying which my cause irritation.
Their is no cure for eczema. I also work in construction and have it between my legs. Not the same type that you have and the doctors are still debating over what my skin problem is. But I have read a lot about eczema and their is no cure. But it does go away on it's own and is treatable.
I would definitely start wearing gloves as washing your hands causes more problems. The doctor should have told you to use dove natural soap in cold water to wash your hands and to apply moisturizer frequently.