It could be a reaction to something on your hands- you can try looking into the lotions you use, any chemicals you use (bleach, other household cleaners), note if there is a pattern to you touching a certain food then seeing the rash appear. Sometimes things like this can also be caused by a lack of a certain vitamin or mineral- to be sure, you will need to see a doctor that can see you in person and gather more of your medical history, but hopefully you have a few ideas on where to start figuring it out. Let us know how you are doing!