Hi Cristie,

This sounds like something I've heard before.  It sounds to me like you and your Mom may have picked up scabies or some type of fungus.  You may want to see a Dr. and have them do a test.  or if your into alternatives try mixing rosemary and tea tree essential oil/ 5  drops in a small handful of basic cream and apply this to your hands for 4 to 5 days 2  times a day.  Let me know if it works.

Their are also viral rashes that can develop on the hands but it's highly unlikely that both of you came up with it at the same time.  I'm going with some critter... Hope this helps...