Arm splint
A splint may be a good short-term treatment for any painful injury. Using a splint helps keep an injury from moving. This may help prevent further injury until you can see your doctor.
Position the splint so the injured limb cannot bend. A good general rule to follow is to splint from a joint above the injury to a joint below it. For example, splint an injured forearm from above the elbow to below the wrist.
There are two ways to splint an injury:
When splinting an injury, make sure that you do not tie the splint too tight. Your splint may be too tight if you have:
These splinting methods are short-term first aid measures until a doctor can check the injury.
Arm sling
A sling is a bandage used to support an injured arm.
To apply a sling:
Do not use a sling for a long period of time. Immobilizing an arm for too long can cause a frozen shoulder (adhesive capsulitis).
WebMD Medical Reference from Healthwise