I am experiencing small red bumps on my skin. They started on my forearms, but over last two days have spread to my face, neck, mostly my hands, and a few spread out all over. They itch, but only slightly. I don t have any symptoms of having an illness. Is this an allergic reaction, or maybe a parasite? The only thing I can think of that has been different in my routine is that I found several sand sollars on the beach. Do they emit some sort of toxin?