Labia/vulva

Hi ladies. I have a question. I’ve been on my period and I wear pads. I’m starting to be at the end of my period so ive been wearing panty liners the last two days. Well today I’ve barely been bleeding like at all( I wore a pad just incase bc you just never know) but it really started to irritate me idk if it’s Bc I’m not really bleeding anymore or if it was my pants too tight or what. So I checked my vagina to make sure it wasn’t too irritated or anything and on my vulva when I pulled back my labia lips where the “crease” is I seen a little bump it looks like a pimple ? I haven’t shaved recently or anything like that. Is this normal ? I’ve just never had one in that spot before so just concerned.