Could be pressure from the baby. I am swollen as well! When my doctor checked for dilation he even commented that I was swollen and asked if I itched or if it could be an infection and I said no it's from her head being so low and sure enough I was right because I was 2cm when he checked.
I noticed mine during a bath, it was like ridiculously swollen. No itch or smell either. But some people on here said it could be due to baby putting pressure on you down there,
It just happened in the last few hours it was not like this when I took my shower at 8 @mamabear9456 I remember it looking like this after my first c section.