Yuji

What is LU10?

LU10 (Yuji) is an acupressure point on the fleshy pad at the base of the thumb, halfway along the first hand bone.

The name Yuji means Fish Border. Classical writers thought the plump thumb pad looked like the belly of a fish, and LU10 sits along its edge, where the pale skin of the palm meets the darker skin of the back of the hand.

LU10 is the tenth point on the Lung channel and one of its five classical command points. Older texts call it the spring point and link it with clearing heat, so tradition reached for it mainly for throat and voice trouble: a raw sore throat, a hoarse or lost voice, a dry hacking cough, and a feeling of heat in the palms.

It is also simply a muscular spot. The thumb pad is a thick bundle of small muscles that works hard when you type, grip, scroll or play an instrument, and most people find it tender when they press it for the first time.

The honest verdict on the evidence

There is essentially no human research on LU10 by itself. No controlled trial has tested finger pressure here against a dummy point for sore throat, cough or anything else. What exists for acupressure in general is mostly small, unblinded and short-term, and that is a weak base to build claims on.

Two things worth saying once, clearly. Being old and taught in every curriculum is not evidence that a point works. It is also not evidence that it is safe for you. Those are separate questions from the tradition, and we answer them separately below.

Used sensibly, LU10 is gentle self-massage of a hand muscle. That is a reasonable thing to try for comfort. It is not a treatment for an infection, and it should never replace care you actually need.

Where is LU10 and how do you find it?

LU10 sits on the palm side of the thumb pad, at the midpoint of the first hand bone, on the line where pale palm skin meets darker back-of-hand skin.

• Open your hand. Rest it palm up on a table or on your lap, fingers relaxed and the thumb held slightly away from the index finger.
• Find the first hand bone. Trace back from the base of your thumb towards the wrist. The long bone under the thumb pad is the first metacarpal. Feel its two ends: the knuckle at the thumb and the joint near the wrist.
• Go to the halfway mark. LU10 is level with the middle of that bone, not at either end. On most adult hands this is roughly 2 to 3 cm down from the thumb knuckle crease.
• Slide to the colour change. Look at the edge of your thumb pad from the side. There is a visible border where the lighter palm skin turns into ordinary hand skin. LU10 sits on that border, on the palm side of it.
• Press into the muscle. You should be on soft muscle, not hard bone. Sink in gently and you will usually feel a distinct tender or achy spot.

A useful cross-check: make a loose fist and the thumb pad bulges. LU10 is in the fattest part of that bulge, at its outer edge. If your finger is on the crease between the thumb and index finger, you have gone too far towards the web of the hand. If you are on the wrist crease, you have gone too far back.

Both hands have an LU10 and both are used. Tenderness is common here even in people with no symptoms, so a sore spot does not mean anything is wrong.

How do you apply pressure to LU10?

1. Sit and settle. Rest the hand palm up on your thigh or a table so the thumb pad is soft and unloaded. Working on a tense, gripping hand is harder and more uncomfortable.
2. Place the opposite thumb. Put the pad of your other thumb on LU10 and curl your fingers around the back of the hand to support it. That gives you control without squeezing.
3. Sink in slowly. Press straight down into the muscle over three or four seconds. Aim for a firm ache you could hold a conversation through, around a 4 out of 10. Sharp pain means too hard.
4. Hold or circle. Either hold steady for 20 to 60 seconds, or make small slow circles for the same time. Breathe out as you press and let the shoulder drop.
5. Release gradually. Ease off over a couple of seconds rather than lifting suddenly, then swap hands and repeat.
6. Repeat sensibly. Two or three rounds per hand, up to three or four times a day, is plenty. More is not better here.

This is finger pressure only. Nothing on this page involves needles, skin-breaking or burning anything on the skin, and none of those belong in self-care at home.

Stop immediately if the pressure causes sharp or shooting pain, numbness, pins and needles into the thumb, or pain that lingers after you let go. Stop too if the skin reddens and stays sore, or if your symptoms get worse while you work.

Who should avoid it

• Broken or infected skin. Do not press on a cut, blister, burn, rash, boil or any area that is hot, swollen and red.
• Recent injury or surgery. Avoid the point if you have a suspected or healing fracture of the thumb or hand, or recent hand, wrist or carpal tunnel surgery.
• Painful thumb-base arthritis in a flare. If the joint is already swollen and angry, firm pressure usually aggravates it.
• A cannula, drip or recent blood draw in that hand. Work on the other side instead.
• Easy bruising or blood thinners. Keep pressure light, and stop if marks appear.

What is LU10 traditionally used for?

• Sore throat. This is the headline classical use. Older texts treated LU10 as a point for clearing heat from the throat, and it still appears in that role in modern teaching. No controlled human trial has tested finger pressure on LU10 for a sore throat, so there is nothing to show it shortens an infection or beats simple comfort measures.
• Hoarseness and voice strain. Singers, teachers and speakers are sometimes taught to rub LU10 before or after heavy voice use. The claim is traditional and anecdotal. There is no published human evidence that it protects or restores the voice.
• Dry cough. Tradition linked LU10 to a dry, tickly, unproductive cough rather than a wet chesty one. Again, this rests on classical theory. Cough trials in acupuncture use multi-point protocols, so nothing can be credited to LU10 alone.
• Hot or sweaty palms. Classical sources mention feverish palms as an LU10 pattern. This has never been tested in any way that would tell us if the point matters.
• Tired, gripping hands. This is the most down-to-earth use. LU10 sits in the middle of the thumb muscles, so pressing it is direct massage of a muscle group that overworks in typing, scrolling, lifting and playing instruments. General hand massage has modest short-term evidence for comfort and perceived tension, but that evidence is about massage, not about this point.
• A moment of calm. Many people use LU10 as a discreet thing to do with the hands before speaking or during stress. Slow pressure paired with slow breathing can settle you. That is a reasonable effect of the breathing and the pause, and it is not specific to LU10.

Taken together: LU10 has a long and consistent traditional reputation for the throat and voice, and almost no direct human evidence behind it. Treat it as comfort care you can try, not as a reason to delay getting a persistent throat or cough looked at.

Are there tips for using LU10 effectively?

• Find the midpoint before you press. Locate both ends of the thumb bone first, then go to the middle. People who skip this usually drift to the thumb knuckle or the wrist and never find the tender spot at all.
• Warm the hand first. Cold hands are stiff and more sensitive. Thirty seconds of rubbing the palms together, or a warm mug held for a minute, makes the pressure far more comfortable.
• Use your thumb, not your fingernail. The flat pad of the opposite thumb spreads the force. A nail tip concentrates it into a point and just hurts the skin.
• Anchor with your other fingers. Wrapping your fingers behind the hand gives you a stable grip, so you press rather than pinch and squeeze.
• Pair it with your breath. Press as you breathe out, ease as you breathe in. The rhythm stops you bearing down too hard and is usually the most calming part of the routine.
• Do both hands. It takes an extra minute and keeps the thumb muscles evenly worked, which matters if you type or grip all day.
• Short and often beats long and hard. A minute a few times a day is better tolerated than one grinding five-minute session that leaves the pad sore.
• Combine it with the obvious. For a sore throat, fluids, rest, warm drinks and a lozenge do real work. Use LU10 alongside those, not instead of them.
• Keep a simple note. Write down your symptom score out of ten before and an hour after, for a week. Self-applied pressure is unblinded, so you will not get proof, but you will see whether it is worth your time.
• Set a stopping rule in advance. Decide that you will stop if the thumb pad is still sore the next day, or if your throat or cough is getting worse rather than better.

What do people get wrong with LU10?

• Expecting a cure. The most common error. LU10 is not a treatment for tonsillitis, strep throat, flu or asthma, and no acupressure point clears an infection. Expecting that leads people to wait too long before getting help.
• Pressing on the joint. Landing on the hard thumb-base joint near the wrist instead of the soft muscle belly halfway along the bone. The joint is bony, it hurts, and in people with arthritis it flares.
• Going too hard. The thumb pad is dense muscle, so it tolerates force for a while and then bruises. Firm ache is the target, not eye-watering pain.
• Working the wrong surface. Rubbing the back of the thumb or the web between thumb and index finger. LU10 is on the palm side, at the colour border of the pad.
• Using a nail or a hard tool. Fingernails and pointed massage tools concentrate pressure, mark the skin and can break it. A flat thumb pad is all you need.
• Pressing over a problem. Working on skin that is cut, burnt, infected or recently operated on, or over a hand that may be fractured. Pressure there delays healing.
• Dropping real treatment. Skipping a prescribed inhaler, antibiotic or voice rest because the point feels like it is doing something. It is comfort care, not a substitute.
• Judging it by the ache. A very tender LU10 does not mean your lungs are unwell. Most people are tender here, especially if they type or grip a lot.

When to see a doctor

Stop self-care and get medical help the same day for a sore throat with trouble breathing or swallowing, drooling, a muffled voice, a stiff neck, or a swelling on one side of the throat. Those need assessment, not pressure.

Book an appointment for a sore throat or fever lasting more than three or four days, a cough lasting more than three weeks, a hoarse voice lasting more than three weeks, any coughing up of blood, or thumb pain, numbness or weakness that keeps getting worse.

What does the research on LU10 actually say?

We found no useful human research on LU10 specifically. There is no controlled trial we can point to that tested finger pressure on this point for sore throat, hoarseness, cough or hand pain against a dummy point or no treatment.

That matters, so it is worth being precise about what is missing. For a claim to carry weight, you want trials where people were randomly assigned, where the comparison was a credible sham, and where someone other than the person pressing recorded the result. For LU10, that body of work does not exist.

What does exist is indirect and cannot be stretched to cover this point. Acupuncture and acupressure trials for cough, asthma and throat symptoms almost always use a protocol of several points at once, often with herbs or other care alongside. Even when such a study reports a benefit, there is no way to say which point contributed, or whether any single one did. Protocols for breathing problems also tend to lean on other Lung channel points rather than LU10.

The broader acupressure literature has the same weaknesses throughout. Studies are usually small, run for days or weeks rather than months, and cannot blind the person doing the pressing. Self-applied treatments attract strong expectation effects, and symptoms like a sore throat or a tickly cough get better on their own, which makes an ineffective treatment look useful.

For contrast, it is fair to say where acupressure does have decent support. PC6 on the inner forearm has repeatedly been tested for nausea and vomiting in reasonably designed human trials, and shows a real if modest benefit. That is the exception in this field, and LU10 is nowhere near it.

The practical conclusion is simple. Use LU10 as comfort care if you like it, judge it on your own experience, and do not let a tradition with no trial behind it stand in for medical advice when symptoms persist or worsen.