History of significant blunt trauma.

http://www.patient.co.uk/doctor/pelvic-fractures

• Any history of significant blunt trauma should raise the consideration of a pelvic fracture.
• Tenderness, bruising, swelling and crepitus of pubis, iliac bones, hips and sacrum.
• Attempts to 'spring the pelvis' to assess stability should be avoided as this is unreliable and may cause additional haemorrhage or injury.