Caring for your plaster cast

Why a plaster cast?

A plaster cast will keep your child’s damaged limb still, reduce any discomfort and allow healing of the bone and surrounding tissues.

A backslab does not completely surround the limb and is used for injuries that have resulted in swelling. It is secured with a bandage.

It is only temporary and will usually be replaced by a full cast at your Fracture clinic appointment.

How do I look after a plaster cast?

• Although the plaster will feel hard, it takes 2 days to dry properly – during this time do treat it carefully avoiding bumping it or standing on it as it will damage the cast.
• The plaster needs to stay dry – if it does get wet, please return to the department for a replacement cast.
• Encourage your child to rest the injured limb and keep it elevated as much as possible (both day and night)
• Encourage your child to wear a sling if provided.
• Use crutches as instructed.
• Encourage your child to wiggle their fingers or toes – this encourages good circulation.
• Do not allow your child to put anything down the plaster, especially if they are complaining of itching – they could damage their skin underneath the cast.

What should I do if my child complains of pain?

Having a fracture (break) can be painful. The plaster will provide some relief as in immobilises the broken part of the limb.

If your child does experience pain we advise you elevate the limb and give some pain relief.

We recommend paracetamol or Ibuprofen. Administer according to the instructions on the bottle.

When should I return to the children’s Emergency Department?

You should return to Children’s A&E immediately if:

• Your child’s fingers or toes become blue, pale, very cold or very swollen.
• Your child is complaining of pins and needles, numbness or severe pain along the affected limb.
• Your child is complaining of pain despite having had paracetamol and Ibuprofen.
• These can all indicate that the circulation to your child’s limb is insufficient.

Can my child go to school with a plaster cast?

There is no reason why your child cannot go to school with a plaster cast providing they are safe on their crutches or have their arm in a sling.

You will need follow up. 

You will need to attend the fracture clinic and will be given a time to attend a walk in clinic. The first time you attend, you will not have a specific time.