Is this the start of an infection?

2 weeks ago I had my gallbladder removed by keyhole surgery, my bellyon and 2 cuts on my stomach have healed but the third one doesn't seem to be healing. It keeps scabbing over slightly then bleeding again, it is now sore to touch and quite red looking and quite hot aswell. There is no sign of any puss and there is no smell, I have been keeping it clean. Is this start of an infection. I never got stitches it was closed with glue.