Acute blue finger syndrome: a rare benign cause of acute digit discolouration

Acute blue finger syndrome is a rare benign condition that mimics digital ischaemia. We discuss the case of a 32-year-old woman who presented with a 6hour history of blue discolouration of the middle finger of the right hand, associated with pain and swelling. There was no history of trauma and this was the first time that the patient had experienced these symptoms. Examination found blue discolouration of the digit primarily on the volar aspect with associated swelling. All investigations, including blood tests, X-rays and Doppler scanning, were normal. The symptoms resolved spontaneously within 48 hours. There were no recurrent episodes or long-term sequelae. Patients presenting with an acutely blue finger need rapid assessment to exclude digit ischaemia. Knowledge of this rare benign condition may prevent unnecessary distress, invasive investigations and potentially harmful treatment of a healthy patient.