I Received 11 Stitches In My Shin 6 Days Ago

I received 11 stitches in my shin 6 days ago for a laceration from a mountain bike accident. The skin around it is slightly red but my skin in not warm. I also have a bone contusion to the side of it that is very tender and swollen. I'm curious if it is normal for the skin around the area to be red. My main fear is staff infection