Yeast infection or skin irritation?

My left lip on my vagina has been super itchy lately. I looked at it the other night and it was a little bit red but gosh it itches so bad. I do shave everything so I’m wondering if maybe that could be the possibility. It almost just feels like really itchy chafing. I haven’t had any other signs of a yeast infection but I’m also wondering if maybe that’s it? Does anyone have any idea?