Solitary confinement is a form of imprisonment where an inmate is isolated from others, often spending 22 to 24 hours a day alone in a small cell. This practice is typically used as a disciplinary measure or to manage inmates deemed dangerous to themselves or others. The psychological effects of solitary confinement can be severe, leading to anxiety, depression, and other mental health issues. Critics argue that it can be inhumane and counterproductive, while supporters claim it is necessary for maintaining safety within facilities like prisons and jails.