Slightly Worried

So today was really warm, And Im a Curvy larger Woman. i frequently Put powder on my thighs to prevent Chafing. I had a lot of Discharge recently as I’m just before my period and it usually happens. But all of a sudden I Have this stinging pain Like crazy. I go to the bathroom and See that Not in the place where i usually chafe, But Higher, Just on either side of my Vulva (Not the actual Pussy But On the thighs Beside my Vulva) I Have 2 Lines. they look like my Skin jus Rose Up there as if a scar. they’re sore and Painful to the touch and i’m thinking it might be due to the weather and My Discharge, Maybe Rubbing Against each other? i just wanna make sure, Thank you for Replies!