My mum had two c-sections and always had an overhang, 17 years after her last one she still has a bit of trouble with her scar, it often gets infected/sore even though it healed with no problems, the best thing to do is keep it dry and let the air get to it as much as you can until it’s fully healed and then essential oils are great for keeping it moisturised, this is what helped mine to heal ☺️
I'm sure a doc appointment wouldn't hurt.. could it possibly just need a warm towel to get some dried up stuff off ? Idk if that makes sense