Fractures can be closed or open as seen here in the pictures. Open means that there is a break in the skin in conjunction with the fracture, often with protruding bone. Closed means that there is no external wound associated with the fracture.

The warning signs that an arm or leg might be fractured include:

- Significant pain along with marked swelling
- An audible or perceived “snap”
- Different length or shape of limb
- Loss of pulse or sensation in the injured arm or leg
- Crepitus (a crackling/popping sound under the skin when pressure is applied)