Hello and welcome to HCM
You have mentioned that the injury
on the shin has left an abration and bruising,
You definetly need to visit your doctor.
The wound care that you are doing is fine but oral antibiotics
and pain killers also need to be administered.
There is a good chance of infection as the wound size is large and there is abration of the skin.
Besides medication, examination of wound is important as there may be dead skin in the wound which requires debridement or removal of dead skin.
Bruising that you are seeing in the wound is due to bleeding into the tissue.
So, without wasting much time, do see your doctor.
Thanks and take care
Dr Shailja P Wahal