Over the years I ve randomly gotten these little red bumps on my knuckles (almost like really small blisters), right where the fingers meet the hand. They cause severe itching which causes the bumps to burst when scratched, which then seems to create more bumps on the adjoining knuckles. It hasn t been a big issue and usually goes away after a few days. However, it recently appeared on my right foot and it won t go away and the itching is much worse than it was on my knuckles. What could it be and how do I get rid of it?