Bruising by csection scar?

[Designsbybequi]

I had my 4 th csection 5 days ago and have a 3+ inch bruise above the right end of the scar. Its the length of my thumb. I marked the borders with a pen a couple days ago and it has slightly passed the lines in one day so is growing very slowly- no redness, no hardening- no pus. Wondering if anyone has dealt with this before?? This csection's recovery has been the best so far with hardly needing any pain meds. I have the most help so have done way less work than my other recoveries and have been able to rest the most, which makes me wonder why I'm having this. They used sutures instead of staples which is different. Thanks for any info.