The term ‘swan neck’ deformity is characterised by hyper-extension of the proximal interphalangeal (PIPJ) joint and flexion of the distal interphalangeal (DIP) joint. It can be associated with a ‘snapping’ motion of the finger on flexion. It is important that mallet injuries are treated early to avoid this deformity developing. Once established, splinting may improve the functionality and motion of the affected digit.