Jingqu

What is LU8?

LU8 (Jingqu) is a Lung-channel point on the inner forearm, about a thumb-width above the wrist crease, beside the radial artery.

In classical Chinese medicine LU8 is the Jing-River point of the Lung channel, linked to the Metal element. Older texts group it with the points used for cough, hoarseness and a tight chest. Its name is usually translated as "Channel Gutter" or "Meridian Gutter", a reference to the groove it sits in.

Being old and widely taught is not the same as being proven. Traditional standing tells you that generations of practitioners used a point; it does not tell you that pressing it changes anything in the body, and it does not tell you the point is safe for you. Both questions have to be answered separately, and on this page they are.

The honest verdict on evidence: there is essentially none for LU8 specifically. We found no controlled human trial testing LU8 on its own for any condition. What exists for acupressure in general is mostly small, short-term and unblinded, which means the results are easy to confuse with placebo and ordinary improvement over time. A few points do better than that — PC6 for nausea and vomiting has repeated controlled human trials behind it — but LU8 is not one of them.

Safety matters more here than at most points, for one plain anatomical reason. LU8 sits right alongside the radial artery, the vessel you feel when you take a pulse at the wrist. Light, brief finger pressure is generally unremarkable for a healthy person. Hard or prolonged pressure over an artery is a different matter, and some readers should leave the area alone entirely.

Everything described on this page is self-applied finger pressure. Nothing here involves needles, heat, cupping or anything that breaks the skin. Treat LU8 as a comfort measure you can try alongside proper care for a cough or a sore throat, not as a replacement for it.

Where is LU8 and how do you find it?

LU8 sits one thumb-width above the wrist crease on the thumb side of the inner forearm, in the groove just outside the radial artery pulse.

• Turn your palm up. Rest your forearm on a table, palm facing the ceiling, hand relaxed. You want the soft inner surface of the wrist exposed.
• Find the wrist crease. Locate the main crease where the hand meets the forearm. That crease is your starting line.
• Find your pulse. Place two fingers on the thumb side of the inner wrist and feel for the radial artery beat. The pulse point at the crease itself is LU9, the point next door.
• Move up one thumb-width. Slide about 1 cun — the width of your own thumb at the knuckle, roughly 2 cm — up the forearm, away from the hand. You are still over or beside the artery.
• Slip off the artery. Move a few millimetres toward the thumb side, into the shallow hollow between the pulsing vessel and the hard ridge of bone. That bony ridge is the lower end of the radius. The hollow is LU8.

Measurements in Chinese medicine are given in cun, which is scaled to your own body rather than a ruler. One cun is the width of your thumb at its widest knuckle, so a tall person's cun is longer than a child's. Use your own thumb, not someone else's.

A useful check: if your fingertip is bouncing with each heartbeat, you are on the artery itself and slightly too far toward the middle of the wrist. Shift a hair toward the thumb until the beat fades but you are still in soft tissue, not on bone. If you land on a hard edge, you have gone too far across.

The area may feel mildly tender or slightly achy under pressure. That is common and not meaningful on its own. Sharp pain, pins and needles, or numbness running into the hand means you should lift your finger off.

How do you apply pressure to LU8?

1. Settle first. Sit down with your forearm supported, palm up. Do not do this while driving or standing on a train.
2. Use one fingertip. Place the pad of your opposite thumb or index finger on the hollow beside the pulse. One finger is enough; the target is small.
3. Press lightly. Aim for about a 3 or 4 out of 10 — noticeable, slightly tender, never sharp. This point sits next to an artery, so firm digging is the wrong instinct here.
4. Hold briefly. Keep steady pressure for 20 to 30 seconds, then release fully for the same length of time. Small slow circles are fine if static pressure feels dull.
5. Repeat a few times. Two or three rounds per wrist is plenty. Keep total continuous pressure under about a minute at a time.
6. Work one wrist at a time. Finish one side, then swap. There is no need to compress both wrists at once.
7. Space out sessions. Once or twice a day is reasonable during a cough or a hoarse spell. Daily use for weeks on end has no particular support behind it.

Stop immediately if the hand goes cold, pale, numb or tingly, or if you feel your heartbeat thumping uncomfortably in the fingertip. Those are signs you are pressing on the artery rather than beside it. Release, shake the hand out, and let normal colour and sensation return before trying again more gently.

Also stop if the spot is still sore the next day, if a bruise appears, or if pressing makes a cough or breathlessness worse rather than better. Soreness that outlasts the session means you used too much force.

Keep nails short and skin unbroken. Never press through a cut, a graze, a rash or a bruise. If you are using this during an illness, wash your hands first — you are touching your own face and wrists repeatedly.

What is LU8 traditionally used for?

• Cough. Classical texts list Jingqu among the Lung-channel points used for cough, especially a dry or barking one. There is no controlled human trial testing LU8 alone for cough, so treat this as tradition rather than a demonstrated effect.
• Sore throat and hoarseness. Old sources connect this point to a scratchy, tight or husky throat. Modern evidence for acupressure on throat symptoms is thin, and nothing isolates LU8. A warm drink and voice rest have better support.
• Wheeze and chest tightness. Tradition places LU8 among points for laboured breathing. Asthma and COPD trials using acupuncture generally combine many points and report mixed, small results. Breathlessness needs medical assessment, not finger pressure.
• Thumb-side wrist and forearm discomfort. Because the point sits in a tender groove near the wrist, people use it for local aching. Gentle pressure near a sore area can feel soothing in the moment. That is a short-lived comfort effect, not a treatment for tendon or joint disease.
• General relaxation. Many readers find any slow, deliberate self-massage calming. This is real and worth having, but it is not specific to LU8 — the same few minutes spent on a forearm or shoulder would likely feel similar.

A fair summary: everything above comes from tradition and personal reports, not from trials. Acupressure research as a field is dominated by small, unblinded, short-term studies, which makes placebo and natural recovery hard to separate from any real effect.

Where a point does have solid backing, we say so — PC6 for nausea is the clearest example in the whole literature. LU8 has nothing of that kind. Use it as a pleasant, low-cost addition to sensible care for a cough or a cold, and judge it on how it feels rather than on what it is claimed to do.

Are there tips for using LU8 effectively?

• Find the pulse, then step aside. The fastest route to LU8 is to locate the radial artery first and then shift a few millimetres toward the thumb. You are aiming for the groove beside the beat, not the beat itself.
• Let your own thumb be the ruler. One cun is your thumb's width at the knuckle. Borrowing someone else's measurement puts you in the wrong place on a smaller or larger arm.
• Go lighter than you think. This is not a point for heavy pressure. Light contact held calmly gives the same sensation without squashing an artery.
• Support the arm. Resting the forearm on a cushion or table lets the wrist muscles relax, which makes the hollow easier to feel and the pressure steadier.
• Keep it short. Twenty to thirty seconds per round, a minute total per wrist. Longer is not better here and raises the chance of a numb or tingly hand.
• Pair it with something that works. For a cough, that means fluids, humid air, rest and your prescribed inhaler or medicine. Acupressure sits alongside these, never instead of them.
• Warm your hands. Cold fingertips make it harder to feel the pulse and the groove. Run them under warm water first.
• Track it honestly. If you want to know whether LU8 does anything for you, note your symptom before and an hour after, for a week. Most coughs improve on their own, so a single good session proves little.
• Stop at the first odd sensation. Tingling, coldness or pallor in the hand means lift off now. These are easy to produce at this spot and easy to avoid.

One practical note on frequency. Daily use during a short illness is reasonable; grinding away at the same patch of wrist for months is not, and it risks making the skin and tendons sore for no clear gain.

What do people get wrong with LU8?

• Pressing on the pulse. Parking a thumb directly on the radial artery and bearing down is the single most common error. LU8 is in the hollow beside the vessel, and heavy compression of an artery is not the goal.
• Confusing LU8 with LU9. LU9 sits at the wrist crease itself, on the pulse. LU8 is one thumb-width further up the forearm. Many videos show the crease and call it LU8.
• Drifting to LU7. LU7 is higher up and further around toward the back of the thumb side, in a notch above the bony bump. If your finger is on a bony prominence, you have left LU8.
• Expecting a cure. No acupressure point cures asthma, a chest infection or a persistent cough. Expecting one delays the care that actually treats the cause.
• Pressing too hard for too long. Minutes of firm pressure here can leave the hand numb, cold or bruised. Short, light rounds are the safer pattern.
• Working both wrists at once. Squeezing both radial pulses simultaneously has no traditional basis and is an unnecessary thing to do to yourself. One side at a time.
• Using it over damaged skin. Pressing through a graze, a rash, eczema or a healing cut is a route to irritation and infection, and it has no upside.
• Ignoring the hand's warning signs. Pins and needles or a pale fingertip are not "energy moving". They are circulation and nerve signals telling you to let go.
• Treating tradition as proof. A point appearing in a classical text means it was used, not that it works. LU8 has no controlled human trial behind it.

What does the research on LU8 actually say?

There is no useful human research on LU8 specifically. We found no controlled trial, and no well-reported case series, that tested LU8 on its own — by acupressure or by any other method — for cough, sore throat, asthma or wrist pain.

That gap is normal rather than suspicious. Trials of Chinese medicine usually test a whole prescription of points chosen for the individual, not one point in isolation. When LU8 appears in a study at all, it is one name on a list alongside several others, and the design cannot tell you what that single point contributed. Studies of needling also cannot be read across to finger pressure, because the intervention is different.

What the wider acupressure literature looks like is worth knowing. Most studies are small, run for a few days or weeks, and cannot blind participants to whether they are being touched. Sham acupressure often performs nearly as well as the real thing, which points to expectation and attention doing much of the work. Reviews of this body of work repeatedly end with the same conclusion: the trials are too small and too flawed to be confident about.

There are exceptions, and they matter for calibration. PC6 for nausea and vomiting has been tested in many controlled human trials, including wristband studies in pregnancy and after surgery, and the evidence there is genuinely reasonable. That is the standard LU8 would have to meet, and it is nowhere near it.

So the honest grade for LU8 is insufficient evidence. That is not the same as "proven useless" — it means nobody has done the work. In practical terms, if gentle pressure beside your wrist feels soothing while you nurse a cough, there is little harm in it, provided you follow the cautions on this page. Do not let it stand in for an inhaler, antibiotics where they are needed, or a proper look at a cough that will not go away.