Ticks are endemic in many regions of the UK and Europe. With recent mild winters, the tick population has been increasing and new areas affected. Tick bites can transmit infections to human beings and a substantial number of ticks are infected with the causative agent of Lyme disease, Borrelia burgdorferi. Healthcare professionals and outdoor enthusiasts should be aware of the risks, of the precautions to take burgdorferi to avoid infection, and of the signs and symptoms of Lyme disease.