Bleeding can be deadly by itself, but it's so easy to manage it.
Bleeding in game has no severity (Not counting multiple bleeding from multiple injuries) like scratch and laceration with are moderated and severe severity.
Bleeding should have severity like injuries mentioned above affecting the player's health depending in how severe the bleeding is.
A severe bleeding is very deadly and can't be stopped 100% with just a simple dirty rag like it is in game.
Source : https://myhealth.alberta.ca/Health/Pages/conditions.aspx?hwid=not12828&lang=en-ca
I suggest adding a mechanic to determine how severe the bleeding is with First aid skill and the need to put multiple bandages on injuries, if not, the bleeding will passtrought the bandage and continue bleeding making the player lose HP even if barely bandaged.
I also suggest making the character slowly getting anxious when they get injured since Physical health affects Mental health causing PTSD / Anxiety
Source : https://pubmed.ncbi.nlm.nih.gov/22409991/
