Solitary confinement is a form of imprisonment in which an incarcerated person lives in a single cell with little or no contact with other people. It is a punitive tool used within the prison system to discipline or separate incarcerated individuals who are considered to be security risks to other incarcerated individuals or prison staff, as well as those who violate facility rules or are deemed disruptive. However, it can also be used as protective custody for incarcerated individuals whose safety is threatened by other prisoners. This is employed to separate them from the general prison population and prevent injury or death.

Prison violence is a daily occurrence due to the diversity of inmates with varied criminal backgrounds in penitentiaries. The three different types of attacks are inmate on inmate, inmate on guard, and self-inflicted. These attacks can either be impulsive and spontaneous or well-planned out and premeditated. Factors such as gang rivalries, overcrowding, minor disputes, and prison design contribute to violent attacks. Prisons are trying to avoid, or at least better deal with these situations by being proactive. They are taking steps like placing violent convicts and gang leaders into solitary confinement, balancing the cells by critically examining each inmate to see where they are likely to reside peacefully, reducing blind spots, and training as well as educating the officers.