Casts at Children’s Mercy

Types of Casts 

Standard (Non-Waterproof) Cast 

Standard casts help protect and support healing bones and soft tissues. These casts may be made of fiberglass or plaster and must be kept clean and dry. 

Important reminders: 

• Keep the cast dry. 

• Do not place objects inside the cast. 

• Do not pull out the padding or attempt to alter the cast. 

• Contact your care team if the cast becomes cracked, damaged, or loose. 

View Cast Application (Dry Cast) video.

Waterproof Cast 

Waterproof casts use special waterproof padding beneath a fiberglass cast, allowing your child to bathe and swim. 

Important reminders: 

• Rinse the cast thoroughly after swimming. 

• Follow your care team's instructions for drying the cast. 

• Do not place objects inside the cast. 

• Do not pull out the padding or attempt to alter the cast.

View Cast Application (Waterproof Cast) video.

Managing Swelling 

Some swelling is normal during the first several days after an injury. 

To help reduce swelling: 

• Elevate the injured extremity above the level of the heart whenever possible. 

• Encourage finger or toe movement if allowed by your care team. 

• Apply ice over the cast as directed to help reduce swelling and discomfort. 

When to Call Your Care Team 

Contact your healthcare provider if your child experiences: 

• Increasing pain that does not improve with rest, elevation, or medication. 

• Numbness or tingling. 

• Fingers or toes that become pale, cold, blue, or difficult to move. 

• Significant swelling that makes the cast feel too tight. 

• New drainage, odor, or skin irritation. 

• A cast that becomes wet (if non-waterproof), cracked, broken, or loose. 

• An object stuck inside the cast. 
  
  

Cast Removal: What to Expect 

Cast removal is a routine clinic procedure. A special cast saw is used to safely remove the cast. While the saw may be noisy and vibrate, it is designed to cut through the cast material—not the skin. 

After the cast is removed: 

• The skin may appear dry or flaky. 

• The arm or leg may feel stiff or weak. 

• Mild discomfort with movement is common. 

• Strength and motion typically return gradually with normal use. 

Your care team will discuss any activity restrictions and when it is safe to return to sports and other activities. 

View What to Expect During Cast Removal video

Key Takeaway 

Casts help protect injuries while they heal. Following cast care instructions, managing swelling, and attending follow-up appointments can help support a safe recovery and return to normal activities.