While the casting material hardens, it will feel warm. Your health care provider will remove the cast with a special cast saw. The saw is designed so that it will not cut your skin. The cast should be removed only by your provider. How long you wear your cast depends on your injury.
Some injuries heal within a few weeks and some take several months.
Most casts should not get wet. A plaster cast will fall apart if it gets wet. A fiberglass cast won't fall apart but the padding underneath may start to smell if it gets wet. Wet padding may also hurt your skin. When you shower or bathe, put your cast in a heavy plastic bag.