What happens if one with a broken hand or arm removes the splint and showers What happens if the broken arm or hands bones get wet?

Answer 1

As long as the skin isn't broken, you won't harm the arm by getting it wet. (If the skin is broken, there might be concern about infection.) The reason doctors usually caution you against showering when you have a broken bone is because the cast (or splint) itself should not get wet -- fiberglass/plaster will lose integrity and fall apart, and a splint will breed bacteria without being dried properly (so removing your splint to shower is probably a better idea than showering with a splint on). That said, if the bones shift or move while you're showering, you're going to have a lot of pain. So you're still going to want to keep your arm immobile, even if removing the splint means you don't have to keep it dry.