I think mine was caused by pressure. I didn't really retain much water, but my vagina was all sorts of puffy. I remember washing it in the shower a week or so after delivering and thinking dang! Is part of it missing?! I was so used to it being so much...er...thicker...
Re: far TMI question inside..enter if you dare.
im gonna say pressure and water retention?
google brought me to this if anyone's interested.
https://www.franklypregnant.com/askarchives69a.htmlI second this. I mean, ankles swell and all b/c of water retention, so why not the vagina?