Some casts, usually those made of plaster, must be protected from water using a plastic bag or sleeve. Others are waterproof so you can swim and shower without covering the cast. If the cast is on your leg, you may get crutches to help you walk. When a bone breaks, the sharp edges of that bone need to be held together so they grow back together the right way. A cast helps to keep the broken bones in place so they can heal.
Most bones take several weeks or months to heal.
It's normal for the skin underneath a cast to itch. Your autograph, please . . . It's safe for your friends and family to sign your cast or draw pictures on it. Ready for removal When your broken bone is mended, it's time for the doctor to remove your cast. Most doctors use a small saw with a dull blade that vibrates the cast enough to break it apart.