I have a itchy Anus !

I know this a weird one, but until I get to a GP as anyone had something similar! My bottom hole and the little areas around it get so itchy, it feels so good to scratch it but it sometimes lasts for a while. At first I thought it was my thongs cutting into me but it’s my actual hole that keeps getting really itchy. It’s not STI as me and my partner have both been tested and clear and only been with each other since but somethings irritating it!! I’m scratching it that much that I’m making it bleed. Any ideas?? I can’t keep walking around scratching my arse 😂