Guides · Bedroom · 12 min read · Updated September 2026

The mirror facing the bed

The tradition’s most repeated warning, and the one that survives translation best. What a mirror does to a bedroom, in plan and in section; where the rule comes from and what the folk reasons were; what a designer sees, what the sleep research can and cannot say; the television that is a mirror after dark; and what to do, in order of effort.

Oriented N 345°

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Fig. 01 A mirror on the wall opposite the bed returns the whole bed to whoever lies in it. The tradition has objected to this for as long as there have been mirrors.

Ask anyone who knows one thing about feng shui and it will be this: no mirror facing the bed. The rule is in every school, every popular book and most grandmothers, and unlike much of the tradition it has a plain physical content. A mirror opposite a bed shows the sleeper the sleeper. What follows is what the tradition makes of that and where its rule comes from, what a designer makes of it, what the evidence adds, which is less than either would like, and what to do about a mirror that cannot be moved.

What a mirror does, in plan

Fig. 01 What a mirror reflects, in two plans with the door at the bottom. A: the mirror on the wall opposite the foot of the bed returns the whole bed to anyone lying in it, which is the placement every school refuses; the grey cone is what the sleeper sees. B: the same mirror moved to the side wall, where the sleeper sees nothing of the bed and the mirror reflects the window and the door instead, which is what the tradition wants a bedroom mirror to do. The rays are drawn the way a physics lesson draws them: from the eye at the pillow to the glass and out again at the same angle. Where the line comes back to the bed, the bed is in the mirror; where it goes to the window, the window is.

A mirror is a window onto the room reversed. Placed on the wall the bed faces, it doubles the bed and puts a second sleeper in the room: every movement in the bed is repeated across from it, and any light that enters, from a landing, a street lamp, a phone on the table, is returned to the pillow from the far wall. Moved to a side wall, the same mirror reflects the window or the door and leaves the bed out of the picture. The plan is the whole of the argument in two dimensions; the section below adds the third, which is where the wardrobe doors come in.

What a mirror does, in section

Fig. 02 The pillow test, in section. A: a mirrored wardrobe door runs from the floor to the lintel on the wall the bed faces; a line of sight from a lying eye meets it at eye height and comes straight back, so the sleeper sees the sleeper, and the bed, ghosted beyond the glass, is in the room twice. B: the same wall, the mirror hung with its lower edge at about a metre and a half; the lowest line of sight from the pillow strikes the bottom of the glass and returns to the wall above the headboard, so the bed is out of the picture and the mirror shows plaster and ceiling. The rule reduces to a test: lie down and look; if you can see yourself, the mirror is facing the bed. The geometry is only the law of reflection: what a mirror shows from a given eye is the point that lies at the same angle on the other side of the glass. It is why mirrored wardrobe doors are the usual culprit, why a mirror hung high on the same wall is harmless, and why the test has to be made lying down, not standing.

A mirror shows, from any eye, the point that lies at the same angle on the far side of the glass. From a lying eye about sixty-five centimetres above the floor, a mirror at that height on the opposite wall sends the line of sight straight back: the sleeper sees the sleeper, whole. A mirror on the same wall whose lower edge is above about a metre and a half catches only lines of sight that climb, and returns them to the wall above the headboard; from the pillow it shows plaster and ceiling and nothing of the bed. This is why the commonest offender is not a mirror anyone hung but the mirrored sliding doors of a fitted wardrobe, which run from floor to lintel and reflect the bed at every height, and why the test the tradition gives, lie down and look, is the right one. Standing, most mirrors are innocent. Lying, the tall ones are not.

Where the rule comes from

The classical texts do not discuss mirrors in bedrooms, for the good reason that the mirrors of the classical period were small discs of polished bronze, kept in boxes and used in the hand; a wall of silvered glass opposite a bed is a possibility of the last two centuries. The rule belongs to the house manuals and the popular tradition, and it grew as mirrors did. The Qing and Republican manuals object to mirrors facing the front door, which send the entering qi back out, and to mirrors facing each other; the bedroom rule appears alongside them and is stated in the same terms. Rossbach, recording Lin Yun’s Black Sect teaching in the 1980s, gives mirrors a chapter: they are the school’s favourite cure, hung to “expand” a cramped room, to draw in a view, to turn away a sha at the door, and to complete a missing corner, and the one place the school will not put one is where it reflects a bed. Too’s illustrated guide of 1996, the best-selling manual in the world, repeats the bedroom rule on its first page about bedrooms and has fixed it in the popular mind since.

The classical objection

The bedroom is the house’s most yin room, the one for stillness, darkness and the body unguarded, and a mirror is an active object in the tradition’s reading: reflective, cold, moving, Water and Metal at once. It doubles what it faces, and the tradition does not want the bed doubled, for the same reason it does not want a bed under a beam or in the door’s line: the place where a body is least able to attend to the room should be the place where the room asks least of it. A mirror asks. It is the one object in a bedroom that keeps moving after the sleeper stops.

What a designer says

The television, and the black glass

The modern bedroom has a mirror the tradition never saw: the switched-off television on the wall the bed faces. Dark glass reflects nearly as well as silvered glass in a dim room, and a large screen at the foot of the bed returns the bed, the window and every light in the room to the pillow exactly as a mirror would, with a standby light of its own added. A phone face-up on the bedside table is a small mirror with a lamp in it. The rule about mirrors is, in practice, a rule about reflective surfaces facing the bed, and a room with no mirror can fail it.

Fig. 03 The same bedroom three times, with the switched-off television where most modern bedrooms have it, on the wall the bed faces. Dark glass reflects nearly as well as silvered glass in a dim room, and in the first panel the screen returns the window, the bedside lamp and the bed itself to the pillow, which is the mirror the tradition’s rule is about, with a standby light added. The second panel shuts it in a cabinet with doors, or under a cloth at night, which is the classical remedy for a mirror that cannot be moved and works as well for a screen. The third turns it on a wall bracket by twenty degrees, so that what the pillow sees in the glass is the wardrobe and not itself: the angle of incidence equals the angle of reflection, and a screen turned a little sends the room somewhere else. A phone face-up on the bedside table is the same problem at a smaller scale, and face-down is the same fix. The reflection lines are drawn as light would go, from the window and the lamp to the glass and from the glass to the pillow. Harding 2019 and Chang 2015 for what a lit screen does to sleep; the tradition’s rule for the mirror; the site’s reading of the two together.

The drawing gives the screen where most bedrooms have it and the two fixes that do not involve moving the bed. In the first panel the dark glass returns the window, the bedside lamp and the bed to the pillow, which is the mirror of the rule with a standby light added. The second shuts it in a cabinet with doors, or under a cloth at night, the classical remedy for a mirror that cannot be moved. The third turns it on a wall bracket by twenty degrees, so that what the pillow sees in the glass is the wardrobe, since the angle of reflection equals the angle of incidence and a screen turned a little sends the room somewhere else; it is the cheapest fix and the one nobody thinks of. The phone face-up on the bedside table is the same problem at a smaller scale, and face-down is the same fix.

What the evidence says

Very little, directly. No study has tested mirrors in bedrooms against sleep, and the site does not expect one. What the research does say bears on the mechanisms the designer describes, and on one of them clearly.

What to do

In order of effort:

Move it. A side wall, or a wall the bed does not face, solves it. The mirror is usually more useful beside the wardrobe, where one dresses, than opposite the bed, where nobody does.
Angle it. A mirror that stands on the floor or hangs on a hook can be turned so that the bed is out of its reflection. Check from the pillow, lying down: if you cannot see yourself, it is fine.
Hang it high. On the wall the bed faces, a mirror whose lower edge is above about a metre and a half shows the wall above the headboard and nothing else. The section above is the reason.
Cover it at night. A curtain, a blind or a cloth over a mirror that cannot move. This is the tradition’s own remedy, the one used in a house of mourning, and a perfectly good one.
Replace the doors. Mirrored wardrobe doors facing a bed are the commonest case and the one people live with longest. Panelled or painted doors, or a frosted film applied to the glass, end it, and a full-length mirror can go inside one of them.
Treat the screen as a mirror. A television on the wall the bed faces is covered, turned, or moved to a side wall like any other mirror, and its standby light goes off with it.

The short version

Lie down. If you can see yourself, or the screen can see you, change something. Everything else on this page is elaboration.