On my arm I first noticed a small red patch and I thought oh ****, what's that?

I don;t knwo why, I just thought 'blood problem' so i looked up the symptoms of Leukemia and it said about 'pigmented rash-like spots' I have no idea what exactly that means.

My interpretation was the red skin thing I saw, but then I noticed these TINY, pin-prick sized BRIGHT RED things and maybe a little larger, but smaller than a small mole, that look like they want to be moles but instead are bright red :(

Anybody notice these on themselves? Anything to worry about?