Sleeping directions according to Vastu are guidelines to sleep in a way so that you receive favourable energies and reject unfavourable ones. Each direction has its own effect on the person sleeping. But, as per vastu, you are free to sleep with your head in any direction EXCEPT NORTH.
To sleep with your head facing North, is strongly opposed. It might cause major illnesses and sleepless nights for the person sleeping in such a position.
Vastu Shastra highly recommends sleeping facing towards South, as this is believed to provide sound sleep and increase the wealth and prosperity in the household.
Keeping your head in East direction increases memory, concentration and good health. Students must sleep with their head facing East in order to increase their memory, grasping power and concentration.
Sleeping in west is also a favourable direction. Sleeping with your head facing West gives you fame, reputation and prosperity.