Suggest Treatment For Laceration Around The Stitch After Injury

hi, my 16 mth old son fell and hit his forehead on sept 26th. he needed 8 stitches and a couple of desolvable ones inside to close the very deep laceration its just over an inch long, could you just reasure me as to the stages of healing and if these type of stitches will heal ok cause at the moment it looks awful and i cant imagine it healing well at all, the whole area around where the stitches were just looks like one big scar in certain lights, they were only taken out on monday the 4th oct, at the moment the skin has joined well at the top and middle but the bottom (inbetween his eyes) hasnt cloes so well looks like there is almost a little step, the skin is higher on one side than it is on the other? the top down to the middle of the cut is a very dark deep red/ burgandy colour is this normal? aslo i was advised to buy some bio oil to use when the wound has healed would you recommend this?