Severe pain after an injury
Swelling
Bruising
Finger looks crooked, bent, or deformed
Trouble bending or straightening the finger
Pain when trying to move the finger
Tenderness to touch
Numbness or tingling
Finger feels unstable or loose
Open wound or bone visible
Finger turns pale, blue, or cold
Pain that does not improve with rest or ice
Inability to use the finger normally