Binao

What is LI14?

LI14 (Binao) is a Large Intestine channel point on the outer upper arm, where the deltoid muscle narrows to its insertion.

In classical Chinese medicine it is described as a meeting point of the Large Intestine channel with the Yang Linking vessel. Texts list it for shoulder and arm pain, stiffness of the neck, lumps in the neck, and — surprisingly to modern readers — eye complaints, because the channel is said to run up to the face.

Two things are worth saying once, here, so they do not have to be repeated on every section below. First, a point having 2,000 years of use behind it is not evidence that it works; tradition records what practitioners believed, not what was tested. Second, tradition is not evidence of safety either. Old texts were written for a world without anticoagulants (blood thinners), joint replacements or lymph node surgery, so the modern cautions further down this page matter more than the classical ones.

The honest verdict on the evidence: there is essentially no human research on LI14 on its own. It turns up inside multi-point needling protocols in shoulder-pain studies, which tells you nothing about this point by itself, and no acupressure trial has isolated it. So the realistic expectation is a pleasant, low-risk bit of self-massage over a muscle that often holds tension — not a treatment.

Everything described on this page is self-applied finger pressure on your own arm. This library does not teach needling, moxibustion or cupping, and nothing here should be read as instruction in those. Where a study needled LI14, we say so because that is what the researchers did, not because you should.

If you came here from a video promising that LI14 clears eye disease or dissolves neck lumps, treat that claim as unsupported. A lump in the neck is something to have looked at by a doctor, not something to press.

Where is LI14 and how do you find it?

LI14 sits on the outer upper arm at the lower tip of the deltoid muscle, roughly level with the point where that muscle narrows into a V.

• Let the arm hang. Stand or sit with the arm relaxed at your side. Use the opposite hand to explore. Tensing the arm makes the muscle edge harder to read.
• Find the two ends. The top landmark is the bony tip of the shoulder. The bottom landmark is the crease on the outside of your elbow when you bend it.
• Trace the deltoid. The deltoid is the rounded cap of muscle over your shoulder. Run your fingers down its outer edge and you will feel it taper to a narrow point partway down the upper arm.
• Settle on the insertion. LI14 is at or just above that tapering tip, on the outer-front side of the arm, slightly below the midpoint between shoulder tip and elbow. Classical texts place it 7 cun above the elbow crease on the line to the shoulder — in practice, about four to five of your own thumb-widths below the shoulder tip, or roughly 10–13 cm on an average adult arm.
• Confirm by feel. Press gently along that strip. LI14 usually feels firmer and more tender than the soft muscle belly above it, because tendon meets bone there.

Work from bones and muscle edges rather than counting centimetres. Arms vary a lot in length, so your own thumb-width is a better ruler than a tape measure.

One honest caveat: textbooks differ slightly on whether LI14 sits exactly at the deltoid tip or a little above it. What everyone agrees on is the outer upper arm at the deltoid insertion. If you are within a couple of centimetres of that, you are in the agreed area. Do not drift up to the shoulder joint itself — that is a different point.

How do you apply pressure to LI14?

1. Get comfortable. Sit with the arm you are treating relaxed and unsupported at your side, or rested on your thigh. Reach across with the opposite hand.
2. Place the thumb or fingers. Lay the pad of your thumb, or two fingertips, flat on the spot. Use the pad, never a fingernail or a hard tool.
3. Press in slowly. Sink in over two or three seconds, angling straight into the arm. Aim for a firm, dull ache you would rate about 3 or 4 out of 10 — noticeable, clearly bearable, never sharp.
4. Hold or circle. Hold steady pressure for 20 to 60 seconds, or make small slow circles over the same spot. Breathe normally; do not hold your breath.
5. Release and repeat. Ease off slowly, rest a few seconds, and repeat two or three times. Then do the other arm if you like.
6. Keep sessions short. Two or three minutes per arm, once or twice a day, is plenty. More is not better on a tendon insertion.

Finger pressure only. Do not use pressure pens, massage guns on a high setting, or anything that breaks or bruises the skin.

Stop straight away if you feel electric, shooting or tingling sensations running down toward the hand. That suggests you are pressing a nerve rather than the muscle, and nothing is gained by pushing through it.

Also stop if the ache is still there an hour later, if the skin bruises, or if the arm feels weaker afterwards. Soreness that builds over days means you are pressing too hard or too often, not that it is working.

If you have numbness, pins and needles, or weakness in the arm already, do not press at all until a doctor has explained why.

What is LI14 traditionally used for?

• Shoulder and upper arm pain. This is the main traditional use, and the one with the most plausible link to anatomy, since the point sits right on a tendon insertion that genuinely gets sore. Human evidence is weak: LI14 appears inside multi-point needling protocols in shoulder-pain research, but no study has tested it alone, and none has tested finger pressure on it.
• Stiffness and restricted reaching. Classical texts list difficulty raising the arm. Gentle pressure and massage over a tight deltoid can feel loosening in the moment, which is ordinary soft-tissue massage rather than anything specific to this point. There is no trial showing it improves range of movement.
• Neck tension and stiff neck. Tradition connects the Large Intestine channel up through the neck. No human research supports LI14 for neck problems, so treat this as a channel theory claim, not a finding.
• Eye complaints. Older texts list LI14 for blurred vision and eye pain, via the channel pathway to the face. There is no evidence of any kind for this, and eye symptoms need an eye examination rather than arm pressure.
• Lumps and swellings in the neck. Classical sources mention scrofula, an old term for tuberculous neck glands. This is a historical use with no modern support. Any new or persistent neck lump needs a doctor, promptly.
• General self-massage of a working arm. The most defensible everyday use. People who carry bags, lift, paint or type often find the deltoid insertion tender, and pressing it is a reasonable, low-risk thing to do. Expect short-term comfort, not change in an underlying problem.

Across all of these, the pattern is the same: strong traditional standing, almost no direct human testing. Anyone presenting LI14 as a proven treatment for any of them is going beyond what is known.

Are there tips for using LI14 effectively?

• Find the tender spot, not the textbook spot. Explore a couple of centimetres in each direction along the deltoid edge. The spot that gives a distinct dull ache is the one worth working, and it is usually within the agreed LI14 area anyway.
• Warm the arm first. A hot shower, or a minute of rolling the shoulder, makes the tissue more comfortable to press and reduces the urge to dig hard.
• Use the opposite hand, not a tool. Reaching across gives you good control and natural feedback. Hard tools remove that feedback and are how people bruise themselves.
• Keep the arm slack. If you hold the arm out or brace it, the deltoid contracts and the insertion is harder to feel. Let gravity hold the arm down.
• Pair it with movement. After pressing, roll the shoulder slowly through a few comfortable circles. Movement after soft-tissue work tends to feel better than pressure alone.
• Do both arms. Even if only one side aches, the other often shares the same tension from the same daily habits.
• Keep a short note. Write down the pressure you used and how the arm felt the next day. This is the only way to tell a real benefit from a good mood, since there is no evidence base to guide you.
• Give it a fair but limited trial. Two weeks of daily short sessions is enough to notice a pattern. If nothing has changed, the honest conclusion is that it is not helping you.
• Treat it as part of a routine. Sleep position, bag weight, desk height and shoulder exercises will usually matter more for arm pain than any pressure point. Use LI14 as a comfort measure alongside those, not instead of them.

What do people get wrong with LI14?

• Expecting a cure. The single most common error. LI14 is a self-massage spot with no proven treatment effect; going in expecting a frozen shoulder or an eye problem to resolve sets you up for disappointment and delays real care.
• Confusing it with LI15. LI15 sits up in the hollow at the shoulder tip when the arm is raised. LI14 is further down the arm at the deltoid insertion. People reach for the shoulder joint out of habit and then wonder why the landmark does not match.
• Pressing on bone. Landing on the hard shaft of the upper arm bone instead of the muscle and tendon over it. Bone pressure is sharp and achieves nothing — back off and find the softer, ropier tissue.
• Digging too hard. Aiming for pain rather than a dull ache. Tendon insertions bruise easily, and a bruised arm is sorer for days.
• Using a hard tool. Pressure pens, knuckles and massage guns on full power remove the feedback that stops you overdoing it.
• Pushing through nerve sensations. Shooting or tingling down the forearm means you have found a nerve. Carrying on is how people end up with a numb patch, not a result.
• Pressing an arm that should be left alone. Swollen arms after lymph node surgery, arms with a dialysis access site, recent fractures and post-surgical shoulders all get pressed by people who skipped the cautions.
• Treating a neck lump at home. Classical texts mention lumps; that is history, not advice. New lumps need examining.
• Overdoing frequency. Several long sessions a day inflames tissue rather than relaxing it. Short and occasional beats long and daily.

What does the research on LI14 actually say?

There is no useful human research on LI14 by itself. No controlled trial we can point to has tested this single point, and none has tested finger pressure on it at all.

What does exist is indirect. LI14 appears as one point among many in acupuncture point prescriptions used in studies of shoulder pain, including hemiplegic shoulder pain after stroke and painful stiff shoulder. Those studies needled a group of points together, often alongside physiotherapy. Even where such a protocol showed benefit, the design cannot tell you which point contributed, or whether any single point did. It also cannot tell you whether pressing with a thumb would do the same thing, because needling and pressing are different inputs.

The wider acupressure literature has the same weaknesses almost everywhere. Trials tend to be small, short, and unblinded, meaning participants knew they were being treated. Touch, attention and expectation all produce real measurable improvements in how pain is reported, so without a credible sham comparison it is very hard to separate the point from the ritual around it. Musculoskeletal pain is especially prone to this.

The one place acupressure has genuinely decent human evidence is PC6 for nausea and vomiting, where multiple controlled trials point the same way. That is the exception, not the pattern, and it does not transfer to LI14.

So the honest summary: strong classical standing, no direct human testing. That is not the same as saying LI14 does nothing. It means nobody has checked properly, and you should not let anyone tell you otherwise. If the research situation changes, this page will be updated. Until then, the sensible use is as a low-risk comfort measure, with your expectations set accordingly and your real shoulder problems taken to a clinician.