Zhiyin

What is BL67?

BL67, or Zhiyin, is the final point of the Bladder channel, sitting at the outer corner of the little toenail.

Its Chinese name is usually translated as "Reaching Yin". In classical theory it is where the Bladder channel hands over to the Kidney channel, which is why older texts group it with points that "turn" or "move" something stuck. It is one of the twelve jing-well points, the small points at the fingers and toes that tradition treats as sharp, fast-acting and best used briefly.

Almost every acupuncture curriculum teaches BL67, and almost every one teaches it twice: once for its famous use in turning a breech baby, and once as a point to avoid during pregnancy outside of that supervised setting. Both halves matter. The research attached to BL67 is nearly all moxibustion research — warming the point with burning mugwort — carried out by clinicians on pregnant women under supervision. That is not what this page describes, and it is not something to copy at home.

For self-applied finger pressure, the honest verdict is that there is no useful human research on BL67 for any condition. The traditional claims are old and consistent, but age is not proof. A point being classical tells you it was used widely; it does not tell you it works, and it does not tell you it is safe for you. BL67 is a clear example, because the tradition that made it famous is the same tradition that forbids it in pregnancy.

Treat BL67 as a comfort practice with a long history and a short evidence file. If you are pregnant, pressing it is off the table entirely, and anything to do with a breech baby or with labour is a conversation for your midwife or doctor, not a video.

Where is BL67 and how do you find it?

BL67 sits on the outer edge of the little toe, level with the outside corner of the toenail.

• Sit so you can reach the foot. Rest your ankle on the opposite knee, or sit on the floor with the knee bent. You need to see the toe clearly, so take off socks and good light helps.
• Find the little toe. That is the fifth and smallest toe, on the outside of the foot, furthest from the big toe.
• Go to the outer corner of the nail. Look at the little toenail and find the corner furthest from the other toes, on the side facing away from the foot.
• Step back about two millimetres. Classical texts place BL67 roughly 0.1 cun behind that nail corner. In everyday terms that is about the width of a matchstick, right where nail meets skin on the outer side.
• Confirm by feel. You should feel firm bone just under thin skin. Many people notice the spot is more tender than the surrounding toe, though tenderness is not required and is not a test of anything.

Two mix-ups are common. The point on the other side of the same nail belongs to a different channel, so stay on the outer corner. BL66 is a separate point further back, in the small hollow just in front of the knuckle at the base of the little toe, on the outer edge of the foot.

If your little toe is curled under, scarred, or carries a corn or callus, the landmark can be hard to read. Work from the nail corner rather than guessing from the middle of the toe, and do not press on a corn or hardened skin.

How do you apply pressure to BL67?

1. Wash and trim first. Clean hands and short fingernails matter here, because the point sits on thin skin over bone and a long nail will cut rather than press.
2. Get into a stable position. Rest the ankle on the opposite knee so the foot is supported. Reaching awkwardly from a chair makes you press harder than you meant to.
3. Pinch the toe. Place the pad of your thumb on the outer corner of the little toenail and your index finger on the opposite side of the toe, so the toe is held between them.
4. Press firmly, not sharply. Aim for a dull, noticeable pressure of about three or four out of ten. If it stings, burns or makes you flinch, you are pressing too hard or with a nail edge.
5. Hold for 30 to 60 seconds. Breathe normally. You can hold steadily or use small circles, whichever is easier to keep gentle.
6. Release and repeat. Rest for about half a minute, then repeat up to three times. Do the same on the other foot if you want to work both sides.
7. Keep sessions short. Once or twice a day is plenty. Jing-well points are traditionally used briefly, and more pressure on a small bony toe only risks bruising.

Stop immediately if you get sharp pain, numbness, pins and needles, or if the skin reddens and stays red after you let go. Stop too if the toe feels hot or throbs afterwards.

This is finger pressure only. Nothing on this page involves needles, burning herbs, cups, or anything that breaks or marks the skin, and none of those belong in self-care.

What is BL67 traditionally used for?

• Breech presentation. This is the use BL67 is famous for, and in practice it means moxibustion applied by or under the guidance of a clinician, not finger pressure at home. Controlled trials exist and are discussed below; they are low-certainty and they do not test self-applied pressure.
• Labour and delivery. Classical texts list Zhiyin for difficult or stalled labour and for retained placenta. Whether anything is done at this point around labour is a decision for a midwife or doctor, never for the reader, and there is no good human evidence for self-use.
• Headache at the back of the head. The Bladder channel runs up the back of the leg, spine and skull, so tradition uses its end point for occipital headache and stiff neck. No trial has isolated BL67 for headache, so this sits on tradition alone.
• Eye discomfort. Older sources list red, sore or strained eyes, again on channel logic rather than any measured effect. Treat it as folklore, and get persistent eye pain or vision change looked at properly.
• Blocked nose. Some texts list nasal congestion and nosebleed under Zhiyin. There is no human research supporting this, and nothing here replaces treatment for sinus infection or allergy.
• Urinary complaints. Because it belongs to the Bladder channel, BL67 appears in traditional lists for difficult or painful urination. Painful urination needs a doctor, since untreated infection can spread to the kidneys.
• Brief revival use in old texts. Jing-well points appear in classical first-aid passages for collapse or clouded consciousness. That is historical description only. If someone is unresponsive, call emergency services and do not press anything.

Across all of these, the pattern is the same: long tradition, consistent teaching, and essentially no modern evidence for finger pressure. People who find it calming are not imagining the calm, but calm is not the same as a treated condition.

Are there tips for using BL67 effectively?

• Check the pregnancy question first. Do not press BL67 if you are pregnant or think you might be. This applies from the moment pregnancy is possible, not just once it is confirmed.
• Keep nails short. The skin at the nail corner is thin and sits straight on bone, so a nail edge turns pressure into a scratch. The pad of the thumb is the right tool.
• Warm the foot. Cold toes feel numb and bruise more easily. A warm foot bath or a few minutes under a blanket makes the landmark easier to find and the pressure easier to judge.
• Look before you press. Give the toe a quick glance each time for blisters, cracks, redness around the nail, or an ingrown nail. Any of those means skip the point until it has healed.
• Go lighter than you think. A small bony toe needs far less force than a shoulder or a calf. Firm and dull is the target; sharp means stop.
• Use it alongside the basics. For headache, the boring things still carry the load: water, sleep, eating, screen breaks, and the medicine your doctor or pharmacist suggests.
• Give it a fair, limited trial. If you want to know whether it helps you, try it for a week or two and note what changed. If nothing has, stop rather than pressing harder.
• Take breech questions to your midwife. If a scan has shown your baby is breech, your maternity team will discuss options with you. Anything involving BL67 in that setting is their call and their supervision, not a home project.
• Mind the diabetic foot. If you have diabetes or reduced feeling in your feet, let your doctor or podiatrist look before you add any routine foot pressing. Numb skin does not warn you when it is being damaged.

What do people get wrong with BL67?

• Using it in pregnancy. Do not press BL67 if you are pregnant or think you might be. Every teaching tradition lists this point as one to avoid in pregnancy, and online clips that leave that out are leaving out the main safety rule.
• Trying to turn a breech baby at home. The research behind that reputation used moxibustion delivered or supervised by clinicians, with the pregnancy being monitored. Turning a baby is an obstetric decision with real risks attached, so it belongs to a midwife or doctor.
• Trying to bring on labour. Self-pressing points to start or speed labour is not a home practice, whatever a video says. If you are overdue or want things moving, ask your maternity team.
• Expecting a cure. BL67 will not resolve migraines, sinus disease, a urine infection or an eye problem. Expecting that from a toe point means a real diagnosis gets delayed.
• Digging in with a fingernail. The point sits on thin skin over bone. A nail leaves a dent, a nick, or a bruise, and none of that is "stronger stimulation".
• Pressing the wrong corner. BL67 is on the outer corner of the little toenail, facing away from the other toes. The inner corner belongs to a different channel.
• Pressing through a sock or shoe. You cannot locate a two-millimetre landmark through fabric, and you end up squashing the whole toe instead.
• Working on damaged skin. An ingrown nail, a blister, a cracked heel-to-toe split or a sore that will not close all mean hands off, and the last one means see a doctor.
• Going long because it feels like nothing. Ten minutes of pressing a small toe produces bruising, not results. Short holds, a few repeats, then stop.

What does the research on BL67 actually say?

Nearly all of it studies moxibustion at BL67 — warming the point with smouldering mugwort — in women with a breech baby in late pregnancy. It is not research on finger pressure, and it was not self-administered.

The best-known single trial was published in JAMA in 1998 by Cardini and Weixin, in first-time mothers in China at around 33 weeks. It reported more babies in the head-down position in the moxibustion group than in the group given usual care. Later attempts to repeat the result in other countries produced mixed and less convincing findings.

A Cochrane systematic review of moxibustion for breech presentation has pulled these trials together across several updates. Its broad conclusion is that moxibustion, usually combined with usual care or acupuncture, may reduce the number of babies still breech at birth and may reduce the need for external cephalic version, but the certainty of the evidence is low. Reviewers repeatedly flag small trial sizes, weak or absent blinding, and real differences in how and when treatment was given.

Outside pregnancy, the picture is thinner still. For headache, eye discomfort, blocked nose and urinary symptoms, no controlled human trial isolates BL67, so those uses rest entirely on classical texts. We found no trial of self-applied finger pressure at BL67 for any condition at all.

What that means in practice is simple. The only use with genuine human trials behind it is a supervised clinical procedure in pregnancy — exactly the situation in which you must not press this point yourself. For everything else, BL67 is tradition without evidence, which is not the same as being proven useless, but it is a long way from proven useful. If a breech baby is the reason you are reading this, the useful next step is your midwife or obstetrician, who can tell you what the current options are for your pregnancy.