Cast for a forearm fracture: what to know

Some fractures must first be realigned, and unstable or open injuries may need fixation instead. The support may extend below or above the elbow depending on the fracture level and the amount of rotation that must be controlled.

Early swelling may lead clinicians to start with a splint or a cast that accommodates expansion. As swelling falls, the support can loosen and allow unwanted movement. Repeat examination and imaging can identify loss of alignment before the fracture has united.

A cast restricts wrist and sometimes elbow motion, but exposed fingers should remain visible for circulation and nerve checks. Finger movement also helps limit stiffness and swelling when it has been approved.

Raise the hand above heart level during early swelling when advised, and regularly bend and straighten the uncovered fingers without forcing them. Keep the material dry, shield rough edges, and avoid leaning on the cast or using the injured arm to lift. Remove rings promptly if swelling is expected and it is safe to do so.

Never insert pens or other objects to relieve itching; they can injure numb skin and leave items trapped. Return for planned reviews and wait for clearance before driving, manual work or sport.

Obtain urgent assessment if increasing pain feels out of proportion, the fingers become very swollen, cold, pale or blue, or numbness and tingling persist. New finger weakness or an inability to move them may indicate pressure affecting nerves, muscles or blood flow.

Report a cast that feels excessively tight or loose, cracks, becomes wet, develops soft areas, or rubs the skin. Fever, discharge, a bad smell, or burning beneath the cast also requires prompt review rather than waiting for the next appointment.

Ask which forearm bone is broken, whether alignment remains satisfactory, and why the cast crosses the wrist or elbow. Find out which joints to exercise, when the support may change, and how activity will progress after removal.