Lincolnshire Police are appealing for information on the whereabouts of 18-year-old Stacey McMillan.
McMillan has no fixed abode and was reported missing by the Nomad Trust on September 22, but had not been seen since September 10.
She is believed to either be in the Lincoln or Grimsby areas and officers are appealing for her, or anyone who knows where she is, to get in touch so they can make sure she is safe and well.
McMillan is described as around 5ft 3in tall and slim with shoulder-length hair, which is now believed to be purple.
She was last seen wearing black leggings, a black jacket and pink Nike trainers. She has a tattoo on her hand saying ‘Mrs McMillan’.
Anyone with any information is asked to call Lincolnshire Police on 0300 111 0300.