How should we position our head while we are sleeping?

Considering ancient traditions like Vastu Shastra, the most comfortable direction to sleep in is toward the south. Some current research studies also back this theory. This suggests that your head is towards the south when you lie in bed, and your feet are northward.
Some research has shown that animals, like cattle and deer, naturally direct their bodies north-south direction when eating or resting. Besides, initial research reveals that once people switch to sleeping in a southward-facing direction, their blood pressure drops, and their sleep quality improves.