"What happens when an inmate is put on suicide watch? He's put in an observation room and kept away from dangerous objects. Suicide watch is mostly designed to prevent hanging, which is far and away the most common suicide method in prisons and hospitals. An observation room might have little more than a mattress on the floor. Any stray bits of fabric could be used as a noose: Some states make sure the inmate sleeps with an extra-thick blanket that can't be tied or torn into strips. In extreme cases, a prisoner may be undressed and given a paper gown."