When someone has a traumatic accident such as cutting their leg and bleeding heavily it causes them to go into shock which causes them not to feel things, so they may say they are okay but in reality they need to be taken to the ER asap because when the shock wears off there going to be in a lot of pain, and since they are bleeding heavily they will loose tons of blood which will cause them to become weak and pass out which if not taken care of right away can lead to death.
