Boy hospitalised after falling from window

A toddler has been taken to hospital with a potentially serious head injury after falling from a second-storey window at a home in NSW's Blue Mountains.

The one-year-old boy was initially unconscious when paramedics arrived at the Blaxland home on Wednesday but regained consciousness before he was taken by road to the Children's Hospital at Westmead, CareFlight says.

Investigations into the incident are continuing.