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Does sleeping orientation (pointing one's head in a specific direction) has anything to do with any health problems(even minor ones)?

If Earth's magnetic field has any detrimental effects on our brains, then the orientation of our sleeping posture might have an affect on our body.

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No

There are no detrimental effects on the human body of static magnetic fields. This goes for even strong magnetic fields and certainly weak magnetic fields like the Earth's have no influence whatsoever.

Ref: Safety of Strong, Static Magnetic Fields

Issues associated with the exposure of patients to strong, static magnetic fields during magnetic resonance imaging (MRI) are reviewed and discussed. The history of human exposure to magnetic fields is reviewed, and the contradictory nature of the literature regarding effects on human health is described. In the absence of ferromagnetic foreign bodies, there is no replicated scientific study showing a health hazard associated with magnetic field exposure and no evidence for hazards associated with cumulative exposure to these fields. The very high degree of patient safety in strong magnetic fields is attributed to the small value of the magnetic susceptibility of human tissues and to the lack of ferromagnetic components in these tissues.

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    @Lennart - wrong. Very frequently, buildings are constructed with certain orientation. So that direction of sleeping may affect, e.g. drafts from the window etc... (I personally get significantly worse health-wise if there's a draft near my head when I sleep, even when warm. So if a room is built with northward windows for thermal reasons in sunny climate, and prevailing winds in the location are from the north, the effects are material. Nothing to do with magnetism, of course.
    – user5341
    May 25, 2011 at 15:28
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    @DVK: And more importantly nothing to do with the compass direction you sleep in.
    – Lennart Regebro
    May 25, 2011 at 18:22
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    @DVK: It's not the compass direction that affects the health, it's your position relative to the drafts. A northern room might be colder and have more drafts, but sleeping in exactly the same compass direction in another room would not have the negative effects. Hence it is not the compass direction that is the problem. Full stop.
    – Lennart Regebro
    May 26, 2011 at 14:29
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    @DVK: No, it doesn't depend on that either. It's not the compass direction that is the problem, it's the drafts. You are wrong, sorry. I don't think me repeating this more will help. :)
    – Lennart Regebro
    May 26, 2011 at 15:23
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    @DVK If you built two copies of the same building with the same drafts, one pointing North and one West, the person in the first would have a problem sleeping North and the other the same problems sleeping West. Ergo it's nothing to do with the actual direction.
    – DJClayworth
    Jun 14, 2011 at 13:55

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