Bumps on hands and feet after being in the sun

I'm kinda freaking out. Ever since I started laying out in the sun I have these small itchy bumps on my hands and feet. I remember getting them the last couple of years when I layed in the sun also, but this is the worst, there's a ton of the bumps! ahhhh! help. What do I do, they're freaky looking like little warts or something.