: "A girl had fallen onto rocks and suffered a head injury. We sent a coastguard rescue team to assist the lifeguards."
Medics say the girl fell onto large rocks.
South Western Ambulance Service also attended the scene.
A spokesman for South Western Ambulance Service said: "We were called at 12.01pm about an incident involving someone having fallen from rocks at Gwithian Beach, Hayle.
"Our crews treated a female patient at the scene and transported her by air ambulance to hospital for further care. She had a suspected head injury."
SERIOUS HEAD INJURY
A spokesman for the RNLI said the lifeguards were alerted to the accident by the girl's brother and administered first aid until ambulance paramedics arrived.
Devon and Cornwall Police said they were not involved in the response to the accident, reported Cornwall Live.
The coast of Gwithian offers long sandy beaches to tourists and locals.
There are a number of campsites in and near Gwithian, just northeast of Hayle.
Last month, a man was killed by rocks falling onto him from a cliff above a Cornish beach.
It is thought the victim, whose age is unknown, was crushed by a rockfall at Sandymouth Beach in Bude.
The air ambulance was scrambled as the horror unfolded in front of holidaymakers enjoying the sunshine.
We pay for your stories! Do you have a story for The Sun Online news team? Email us at tips@the-sun.co.uk or call 0207 782 4368 . We pay for videos too. Click here to upload yours