I had really bad dyshidrosis and apple cider vinegar and water (50:50) applied on my palm and between my fingers (where I had the vesicles and blisters) for 30 minutes a day helped to clear it up as it was most likely fungus related from what I have researched.
Cut both hand and toe nails as short as possible cleaning under and around them daily with baking soda.
Apply a paste of baking soda and water to the affected areas, twice a day for three days. Keep paste for 5 minutes, rinse and carefully pat dry paying special attention to dry the area in between the fingers or other possible places moisture may remain. If rash spreads to a new area recommence applying to both old and new areas leaving a large border around effected areas. Continue to clean hands daily with baking soda for a week paying special attention to the areas around and under the nails. Avoid itching as this will cause rash to spread.
Loose disposable gloves can be used to cover the baking soda paste on the hands to help increase absorbtion for faster healing.