I'm also a bigger girl and had a emergency section nearly 12wks ago! My incision got infected unfortunately.. all because its under a skin fold basically.. mine looked very red and wet looking.. also very smelly! I was put on 3 courses of antibiotics as it just wouldn't heal! It's only starting to get better these past 2wks! I was advised by my friend to dry it with a hair dryer on the cold setting! And use cool boiled water to clean it!
It’s probably an infection, try giving it some air do not wash with soap only warm cloth When your showering just allow the water to flow down your body do not soap the area. Also if you have a belly band try using that for some pressure off your back and tummy area maybe 2 hours on and 1 off
I've seen other women suggest folding a pad in half and put it in the fold. I've also seen an insta video with a lady who taped up her belly with physiotherapy tape! I'm still waiting for my first section so I don't have any personal experience for you yet
I’m also a bigger lass I had two sections, when I was in bed I used to hold my belly up to air it out and got a flannel to dab it make sure it’s clean and dry and when it feels/looks like it’s mostly healed I started putting a light dusting of talc on it