Yuzhen

What is BL9?

BL9 (Yuzhen), or Jade Pillow, is an acupressure point on the back of the head, just beside the bony bump at the base of the skull. It is the ninth point of the Bladder channel, one of the longest channels in Chinese medicine.

The name Yuzhen means jade pillow — the part of the head that rests on a pillow when you lie on your back. Classical texts group it with the points used for headache at the back of the head, stiff neck, dizziness, blocked nose and sore eyes. In practice it is one of the less-used points on the channel; most practitioners reach for its neighbours first.

Here is the honest verdict on the evidence. There is no published human trial testing BL9 on its own for any condition, and no good study of finger pressure at this point. Everything written about it comes from tradition and from practitioner habit, not from controlled research. That does not make it worthless, but it does mean nobody can tell you how likely it is to help you.

Two things are worth saying once, clearly, so this page does not have to repeat them. First, the fact that a point has been named and used for a thousand years is not evidence that it does anything. Long use tells you a tradition found it meaningful, not that it outperforms a firm rub on a random spot. Second, long use is not evidence of safety either. Nobody was recording side effects in the eleventh century, and a point sitting on the back of the skull has real anatomy underneath it that deserves respect.

What you can reasonably expect from self-applied pressure here is what you would expect from any gentle, attentive massage of tight muscles at the base of the skull: some short-term easing of tension, and a few relaxed minutes. That is a modest claim, and it is the one the facts support.

Where is BL9 and how do you find it?

BL9 sits on the back of the skull, about a thumb-width to the side of the external occipital protuberance — the bony bump at the back of your head.

• Find the bump first. Run your fingers up the back of your neck onto your skull. In the centre line you will usually feel a small raised knob of bone. That is the external occipital protuberance, sometimes called the inion.
• Work out the level. BL9 is at the level of the upper edge of that bump, not below it. Keep your finger at that height as you move sideways.
• Move out to the side. Slide about 1.3 cun outwards — roughly one and a third thumb-widths, or about 2.5 to 3 cm for an average adult. There is one BL9 on each side.
• Check what is under your finger. You should be on firm bone with a thin layer of muscle over it, usually a little tender when you press. If you have dropped into the soft hollow below the skull edge, you have gone too low.
• Use a mirror or a friend. This point is hard to see and easy to lose. Having someone else place a fingertip while you feel it helps you learn the spot.

A simple cross-check: BL9 is roughly 2.5 cun — about 5 cm — above the back hairline, measuring up the back of the head, then out to the side as described. Hairlines vary a lot, so trust the bony bump more than the hair.

If you cannot confidently feel the occipital protuberance, do not guess wildly. Stay on the firm bone of the back of the skull, above the lower rim, and keep your pressure light. Never apply pressure into the soft hollow at the very base of the skull where the neck meets the head unless you know exactly what you are doing.

How do you apply pressure to BL9?

1. Get comfortable first. Sit upright in a supportive chair, or lie on your side. Do not crane your neck backwards to reach the point; let your head stay in a neutral position.
2. Place your fingertips. Use the pad of your middle or index finger on each side at the same time, one hand per side. Thumbs work too if you cup your hands around the back of your head.
3. Press straight into the bone. Aim your pressure towards the centre of your skull, not upwards or downwards. The bone stops you, which is the point — you are compressing a thin layer of muscle, nothing deeper.
4. Use moderate, steady force. Firm enough to feel a dull ache, light enough that you can breathe normally and keep your jaw loose. Pain that makes you flinch or hold your breath is too much.
5. Hold or make small circles. Either hold steady for 30 to 60 seconds, or make slow circles about the width of a pea for the same time. Keep contact with the skin rather than rubbing it.
6. Repeat a few times. Two or three rounds per side, with a short rest between, is plenty for one session. One to three sessions a day is a reasonable ceiling.
7. Finish gently. Release slowly, then stroke the back of the neck downwards a couple of times with a flat hand.

This is self-applied finger pressure only. Nothing on this page involves needles, heat, suction or anything that breaks the skin, and you should not attempt any of those on yourself.

Stop straight away if you feel dizzy, sick, light-headed, or get pins and needles, visual changes or a sharp shooting pain. Stop if the headache you were treating gets worse. Mild tenderness that fades within an hour is normal; a bruise, a lasting sore spot or a headache that follows every session means you are pressing too hard or in the wrong place.

What is BL9 traditionally used for?

• Headache at the back of the head. This is the classic use — pain across the occiput, often with a stiff neck. No trial has tested BL9 for headache. Broader acupressure studies on tension headache are small, unblinded and short-term, and they cannot tell us whether this specific point adds anything beyond general massage of tight neck muscles.
• Stiff or aching neck. Tradition pairs BL9 with neck rigidity and difficulty turning the head. The muscles that attach to the skull right here genuinely do get tight, so gentle pressure often feels good. That is a plausible mechanical effect, not a point-specific one, and it has not been formally studied.
• Dizziness. Classical texts list vertigo and a heavy, muddled head. There is no human evidence for BL9 here, and dizziness has many causes that need a proper diagnosis rather than finger pressure.
• Blocked or runny nose. Older sources connect BL9 with nasal congestion through the Bladder channel's path over the head. Modern evidence for this is absent. If you want a point for congestion, the ones beside the nose at least sit over the affected area.
• Sore, tired or painful eyes. The Bladder channel starts at the inner eye, which is why points far from the eye were claimed to affect it. There is no trial evidence that pressing BL9 changes eye symptoms.
• General tension and winding down. Many people simply find slow pressure at the base of the skull relaxing before sleep. That is the most defensible everyday use, and it belongs to the comfort of touch as much as to the point.

For scale: the strongest acupressure evidence in the whole literature is PC6 on the inner forearm for nausea, which has repeated controlled trials behind it. BL9 has nothing comparable. Use it as a pleasant self-care habit, not as a treatment you are counting on.

Are there tips for using BL9 effectively?

• Treat both sides. BL9 is a paired point, one on each side of the skull. Working them together is more comfortable and keeps your neck symmetrical rather than twisted.
• Support your head. Rest your elbows on a desk or a cushion so your arms are not holding up their own weight. Tired arms make your pressure shaky and your shoulders tense, which defeats the purpose.
• Warm the area first. A minute under a warm shower, or a warm flannel on the back of the head, softens the muscle so you need less force to get the same release.
• Breathe out as you press in. Slow nasal breathing with a longer exhale helps you stay relaxed and stops you bracing your neck against your own fingers.
• Work the whole ridge, not just the dot. The muscles along the base of the skull are a band, not a spot. Gently exploring a couple of centimetres either side of BL9 usually finds the tender bits that matter.
• Keep it short and regular. A minute or two, once or twice a day, beats one long aggressive session. Soft tissue responds better to repetition than to force.
• Check your screen setup. If the back of your head is reliably tight, the cause is usually hours of forward head posture. Raising your monitor will do more than any point will.
• Write down what happens. Note the date, how long you pressed and how you felt an hour later. After two weeks you will know whether it helps you, which is the only evidence that applies to you personally.
• Do not use it to delay a diagnosis. If headaches are new, frequent or changing in character, book an appointment and use BL9 as comfort in the meantime, not as a substitute.

What do people get wrong with BL9?

• Expecting a cure. The single biggest mistake. No acupressure point cures headaches, sinus problems or vertigo, and anyone promising that is selling something. Expect modest, short-lived easing of tension at best.
• Pressing the wrong spot. Many videos show a point in the soft hollow at the very base of the skull. That is not BL9. BL9 is higher, on firm bone, level with the top of the central bony bump.
• Digging in too hard. Bruising a thin muscle against bone creates a new sore spot that feels like the old one. Firm and dull, never sharp.
• Bending the neck back to reach. Tipping the head into extension to get your fingers in compresses the neck joints. Keep the head neutral and bring your hands to it.
• Using tools. Pens, massage guns, hard plastic hooks and knuckle pressure all concentrate force in a way fingertips do not. Fingers only, on the head.
• Ignoring red flags. Treating a thunderclap headache, a headache after a head knock, or one with fever, neck stiffness, weakness or confusion with self-massage wastes time you may not have.
• Marathon sessions. Twenty minutes of grinding into the occiput often produces a headache rather than relieving one. Minutes, not tens of minutes.
• Assuming tradition proves safety. A point on the skull near implanted hardware, a recent wound or an unstable neck is not safe simply because it is ancient.
• Stopping prescribed treatment. People sometimes trial acupressure by dropping their migraine medication. Add, do not replace, and talk to your prescriber before changing anything.

What does the research on BL9 actually say?

There is essentially nothing. We could find no controlled human trial, no case series and no imaging study that tested BL9 (Yuzhen) on its own, by needling or by pressure, for headache, dizziness, nasal congestion or eye symptoms. That is an honest blank, not a gap we can fill with a citation.

Where BL9 appears in research at all, it is as one point inside a larger prescription. Trials of acupuncture for occipital headache or cervicogenic headache sometimes list it among several points needled in the same session. Those studies report on the package, not the point. Even when such a package beats a control, no conclusion about BL9 specifically can be drawn, and none of those trials used finger pressure.

The wider acupressure literature has the same weaknesses almost everywhere. Studies tend to be small, run for days or weeks rather than months, and cannot blind the person doing the pressing. Touch, attention and expectation all produce real symptom change, so unblinded trials reliably overstate effects. A handful of applications escape this — pressure at PC6 for nausea and vomiting has repeated randomised trials behind it, which is why that claim can be stated plainly. BL9 has no equivalent body of work.

What that means for you is simple. Nobody can honestly quote you a success rate for BL9, say how many sessions it takes, or claim it outperforms rubbing the sore part of your neck. If you try it, you are running an experiment with one participant. Judge it by whether you feel better an hour later, over a couple of weeks, and be sceptical of your own results — symptoms fluctuate on their own.

If your symptoms are persistent, worsening or new, the useful next step is a diagnosis from a clinician, not more time spent on a point with no published evidence behind it.