Itchy anal lump

Sorry for graphic title. A few days ago I developed a really itchy bottom, which I put down to my piles from pregnancy a few years back. But on checking I have a blueish small hard lump under the skin. And it's really itchy. It's only just appeared - I have GP appointment in a week and a half. But Google is driving me mad, so looking for some reassurance in meantime. Thank you.