What is this pea sized lump on the side of my bridge after rhinoplasty? Should I be concerned?

I got my cast off yesterday and I instantly noticed a visible pea sized lump on the left hand side of my bridge. It's very hard and aches very slightly if I press on it. The surgeon said that it was swelling but I wanted a second opinion on it. It's not discoloured at all, it's literally just a visible pea sized lump and it's bothering me because its giving the illusion that I have a slight hump on my nose because of it. Is it just swelling or could it be something else? when should it go down?