Maximum elders will say don’t point your head towards South when sleeping as it is the direction of water flow so not good to align with.
However, astrologically, the best direction of your head when sleeping should be towards the direction of Sog-Tsho (healthy life) depending on year’s Parkha. Sog-Tso is the direction of Vitality and Health and is the second-best in Parkha directions. It is traditional to sleep with one's head pointed in this direction. The direction could be any.
Sog-Tso location in 9 Parkha.
Your Age (Bhutanese calculation system) and the Parkha
Male Age Group Parkha
Female Age Group Parkha
Your Parkha is LI
Parkha direction for LI
The above age group should face their head to East when sleeping in the year 2021. So find your sleeping direction.
Phub Dorji Wang