There will be severe pain in the elbow,you will have swelling and you will not be able to bend your arm.

In some cases people may lose feeling in their hand or lose a pulse (can't feel a heartbeat in the wrist)

What are the signs?

Arteries and nerves run by the elbow it is possible you can injure them during the dislocation.

A nerve injury may result in abnormal feelings or abilities of normal arm or hand movements.