I had delayed bruising on one! It came about 5days post op. Underneath. But it’s almost gone now and I’m 6 weeks post op.
But like Danielle says if it feels hard or starts to hurt a lot more than it has if go and see the nurse.
When I was worried and couldn’t reach nurse I took a pic and sent to my PC by email and she showed it to nurse and got back to me with what nurse said within an hour! X