Is it OK to get a cast wet?

It depends on the type of cast. For example:

  • Plaster casts are meant to stay dry. If your child has a plaster cast over cloth wrapping, do what you can to keep the cast dry. During daily bathing, consider covering your child's cast in a plastic bag, taping the bag shut and keeping the cast outside of the shower or tub — or using another type of waterproof shield.
  • Fiberglass casts can usually get wet. If your child has a fiberglass cast that's lined with a water-repellent liner, it's OK for him or her to get the cast wet — as long as you have the doctor's OK. If your child swims with the cast, thoroughly rinse the inside of the cast with clean water afterward. Generally, you can allow the cast to air-dry. Keep in mind, though, that even a fiberglass cast can become uncomfortable and irritate your child's skin when wet. As with a plaster cast, consider covering your child's fiberglass cast in plastic or using a waterproof shield during daily bathing.

To dry any type of cast, use a hair dryer on a cool setting. Don't use a warm or hot setting, which could burn your child's skin. You might also use a vacuum cleaner hose to pull air through the cast and speed up the drying process.

How can my child keep his or her cast in good shape?

You and your child can take steps to keep his or her cast in good condition. For example:

  • Keep it clean. Keep dirt and sand away from the inside of your child's cast. Cover your child's cast while he or she is eating.
  • Skip lotions. Avoid placing powder, lotion or deodorant on or near the cast.
  • Leave adjustments to your child's doctor. Don't pull the padding out of your child's cast. Don't trim the cast or break off rough edges without first asking your child's doctor.

What else do I need to know about my child's cast?

Contact your child's doctor immediately if:

  • Your child's skin becomes red or raw around the cast
  • Your child feels increasing pain and tightness in the injured limb
  • Your child feels numbness or tingling in the injured hand or foot
  • Your child feels burning or stinging under the cast
  • Your child develops excessive swelling below the cast
  • Your child can't move the toes or fingers of his or her injured limb or they become blue or cold
  • The cast develops a crack, soft spots, a foul odor or becomes soaking wet and doesn't dry after use of a hair dryer or vacuum cleaner hose
  • The cast feels too tight or too loose

Caring for a child's cast isn't always easy. Remind your child that taking care of his or her cast will help minimize discomfort during the healing process — and that the cast will be ready to come off before he or she knows it.

Apr. 28, 2012 See more In-depth