Strangling or strangulation is the compression of the neck leading to restriction of the flow of oxygen through the trachea. Strangling causes an increasingly hypoxic state in the brain, which can lead to unconsciousness or even death. Fatal strangulation typically occurs in cases of violence, accidents, and is one of two main ways that hanging causes death (alongside breaking the victim's neck).
Strangling does not have to be fatal; limited or interrupted strangling is practised in erotic asphyxia, in the choking game, and is an important technique in many combat sports and self-defense systems. Strangling can be divided into three general types according to the mechanism used: