What should you know about cast plaster of paris?

A plaster of Paris cast holds an injured or treated body part still while tissues heal or alignment is maintained. The wet plaster is shaped around protective padding and then hardens into a firm shell. It may be used after a fracture, a procedure, or gradual correction of a limb position.

Padding protects the skin, while the rigid outer layer limits movement. Plaster can be closely moulded to the body, but it is heavier and less water-resistant than some synthetic cast materials. A newly applied cast may feel warm as it sets. Swelling can make the cast feel snug at first, so elevation and regular checks of the exposed fingers or toes matter.

Keep the cast dry and support it carefully until it has fully hardened. Follow the care team's instructions about weight-bearing, slings, crutches, exercises, and follow-up. Move exposed fingers or toes if you have been told this is safe. Do not insert objects, powders, or creams under the cast, and do not trim, reshape, or remove it yourself. If an edge rubs, the cast cracks, or padding becomes wet or soiled, contact the treating service for advice.

Seek urgent medical assessment if pain becomes severe or keeps worsening despite the advised measures, or if exposed fingers or toes become blue, pale, unusually cold, very swollen, numb, or difficult to move. Prompt review is also needed for burning under the cast, a foul smell, fluid leaking through it, fever with increasing discomfort, or a cast that feels dangerously tight. These signs can indicate pressure, reduced circulation, skin injury, or infection.

Ask when you may put weight through the cast, how to bathe without wetting it, which movements you should practise, and when the cast should be checked or removed. Confirm whom to contact if swelling increases or the cast becomes loose, cracked, damp, or uncomfortable.