A blood bin is a term used in rugby union to describe a temporary substitution of a player who is bleeding. According to the sport’s regulations, if a player sustains a visible bleeding injury, they must leave the field to receive medical treatment. This is to ensure the safety and hygiene of all players on the field. The player can be temporarily replaced by a substitute while they receive treatment.
The player who has been substituted off due to bleeding is allowed to return to the field once the bleeding is controlled and the wound is properly covered. The temporary substitute must then leave the field. If the injured player is unable to return within a specified time frame, the substitution becomes permanent. This rule helps maintain the flow of the game while addressing player safety.