Fat pad above butt

Jennifer • Julius was born Jan 23, 2018 ! Our second Cruz was born July 4, 2019!

Is anyone randomly noticing the small area on their back right above the Butt crack/ tailbone is like puffy or swollen?? This is my third (6 months in) and I never noticed it with the first two and I did notice it went back to normal after I laid down for a bit. I don’t swell in my hands or feet is this just swelling? Anyone else know what I’m talking about?