"I am lost." A mum shares her pain as she switches off her son's life support.

A young man has died after he was found lying on a road with severe head injuries on the NSW Central Coast.

Jayden Mason, 21, was found unconscious on a road at Lake Haven about 10.30pm on Saturday.

He had significant head injuries and was treated at the scene by ambulance paramedics before being transported to John Hunter Hospital.

On Sunday, his mother says the family made the heartbreaking decision to switch off his life support after they discovered the extent of his brain damage.

“I love you my son and always will remember you,” Rebecca Payne told The Daily Telegraph.

“I have lost a part of me that I will never ever get back. You are always in my heart and soul ’til we meet again love you with all my life my beautiful son”.

“I just want everyone to know how much he was loved. His brothers, sister and I will never forget him. I am lost.”

The young man’s death has prompted an outpouring of tributes.

Jayden Mason was found unconscious on Saturday night. (Image via Facebook.)

"Rest in peace to one of the greatest people I knew," a friend wrote on Facebook.

"I love you forever Maso, thank you for all the memories growing up. You will never be forgotten. You will live forever in our hearts."

Police are appealing for information and would like to speak with a woman who stopped to help the injured 21-year-old.

She is described as being in her 50s and was driving a dark blue Ford Falcon sedan towing a box trailer.

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