Residents of a village known as Sleepy Hollow are coping with a sleep disorder caused by excessive brain fluid that causes a person to sleep for days, according to the Daily Mail.

Doctors, however, have been unable to identify the cause of the condition that has affected residents in the remote village of Kalachi, in northern Kazakhstan, for nearly four years.

Locals say the strange sleeping disorder is getting worse, with nearly 14 per cent of the towns 600 residents having been affected.