A broken hand might cause these signs and symptoms: 
Severe pain that might worsen when gripping or squeezing or moving your hand
Swelling
Tenderness
Bruising
Obvious deformity, such as a crooked finger
Stiffness or inability to move your fingers or thumb
Numbness in your hand or fingers
 When to call a doctor If you think you might have a broken hand, see a doctor immediately, especially if you have numbness, swelling or trouble moving your fingers. A delay in diagnosis and treatment can lead to poor healing, decreased range of motion and decreased grip strength.