Hegu (LI4): The Hand Pressure Point for Headache and Jaw Ache

Where Hegu Sits

Look at the back of your hand with your palm turned down. Between your thumb and your first finger there is a soft web of skin. The point is not in that web. It sits further back, toward your wrist, in the mound of muscle that rises when you squeeze your thumb and first finger together. Standard reference works place it on the back of the hand, level with the middle of the long bone of the first finger, on the thumb side of that bone. In Vietnamese traditional medicine the spot belongs to a line that begins at the first finger, runs up the outside of the forearm and ends at the face. In English this is called the Large Intestine channel.

Under your fingertip is a small fan-shaped muscle between the hand bones (the first dorsal interosseous). It pulls the first finger sideways. It works every time you pinch, grip a handle or turn a key. Deeper, running from the thumb across to the same long bone, lies the muscle that pulls the thumb toward the palm (the adductor of the thumb). The main pulse artery of the wrist (the radial artery) dives down into the palm between the two heads of that deeper muscle. This happens closer to the wrist than where you will be pressing. That is why the pressure here is aimed sideways into the muscle belly and against the bone, rather than straight down into the gap between the bones.

The skin over the area is supplied by a nerve that runs down the thumb side of the forearm (the superficial branch of the radial nerve). It carries signals from the sixth and seventh nerve roots of the neck. The muscle itself answers to a deeper nerve on the little-finger side (the deep branch of the ulnar nerve), from the eighth neck root and the first chest root. A patch of hand the size of a coin is wired back to two different levels of the spinal cord.

Why This Spot

This corner of the hand is where three useful things meet. They are a hard-working small muscle, a bony edge to press against, and a nerve supply that runs up the arm into the lower neck. Small muscles that open and close a grip thousands of times a day build tight, tender bands, the way the shoulders and jaw do. A firm bony backing lets you reach such a band properly.

In this tradition the spot is described as a gathering place — a low point where the line running through the arm is said to pool before it climbs. That is how the old writers explained working a place on the hand for complaints in the head and face rather than for the hand alone. It is a system of correspondences, set down long before anyone had a map of the nervous system.

We will not tell you what happens inside your body when you press. What is honest to say is this. In this tradition the spot is commonly used for headache, for ache in the jaw and teeth, for a tight neck and for general soreness. It is also the first point taught in most self-applied sets, because it is easy to find.

What the Old Texts Say About Hegu

This is the most heavily documented point in the whole classical literature, and its paper trail runs unbroken for two thousand years. The earliest layer is the Spiritual Pivot (Ling Shu), the second half of the Yellow Emperor's Inner Classic, compiled in the Han dynasty. One of its opening chapters lists a dozen "source" points, one for each of the main channels. These were places where the original strength of a channel was said to pool close to the surface. The hollow on the back of the hand is the one given to the channel of the first finger. Being named in that list is what gave it its standing.

The first book to give it a written address and a list of complaints is The Systematic Classic of Acupuncture and Moxibustion (Zhen Jiu Jia Yi Jing). Huangfu Mi compiled it around the year 259, and it is the oldest surviving manual that works through the body point by point. It records this one for headache, for pain in the jaw and the lower teeth, and for a stiff neck that will not turn. It also lists sore throat and fever without sweating. Later commentaries added a caution for pregnancy, and that caution has been copied forward into every major manual since — which is why it still appears on this page.

In 1026 the Song court physician Wang Weiyi produced the Illustrated Manual of Points on the Bronze Figure (Tongren Shuxue Zhenjiu Tujing). In 1027 two hollow bronze statues were cast to go with it, drilled with a small hole at every point. For examinations the statues were coated in wax and filled with water, and a student who found the right spot was rewarded with a trickle. This location is one of the ones those statues settled for good.

The line most often quoted comes from The Great Compendium of Acupuncture and Moxibustion (Zhen Jiu Da Cheng), which Yang Jizhou published in 1601. It carries a four-line memory verse giving one point to each region of the body. The line for the face and mouth points here. The old writers gave this hollow a name that translates as the joining valley. The verse tells the student that for the face and the mouth, everything gathers at that valley. The same book pairs it with a hollow on the top of the foot between the first and second toes. That pairing is nicknamed the four gates.

Points That Work With Hegu

The dip behind the knuckle of your first finger. Make a loose fist. Run a fingertip back from that knuckle toward your wrist, staying on the thumb side, until it drops into a small notch against the bone. This one is reached for when the ache is low in the back and across the hips. It pairs naturally with the valley point, because both sit on the same line a short distance apart.

The hollow at the base of the thumb. Hold your thumb out sideways as though hitching a lift. Two cords stand up at the base of the thumb with a small hollow between them, right where the wrist folds. Use it for a sore wrist, a grumbling thumb joint, or the ache that comes from gripping a phone or a steering wheel too long.

How to Press Hegu With Your Thumb

Getting Into Position

Sit with both feet flat on the floor and your back supported. Rest the working forearm across your thigh, or on the arm of the chair, so the hand is fully supported and your shoulder can drop. Palm down, fingers relaxed and slightly apart.

How to Find It

Put the pad of the opposite thumb on the soft web between your thumb and first finger. Walk it backward toward your wrist until it rests against the ridge of the long bone. Slide along that ridge until you are roughly halfway between the knuckle and the wrist, then roll the pad off the bone toward the muscle. The tissue changes from hard to springy. Press in gently and angle the pressure back against the side of the bone.

You will know the place by feel, not by sight. Most people describe a dull, heavy ache that spreads a little way into the hand — not sharp, not electric. Some feel a gritty or ropey band rolling sideways under the thumb. Others find a spot much more tender than the tissue a centimetre either side of it. Any of those means you have arrived. If all you feel is skin with nothing underneath, you are still in the web; move further back toward the wrist.

How to Press It

Use the pad of the opposite thumb, not the tip and never the nail. Press inward and slightly toward the bone of the first finger, so the muscle is squeezed between your thumb and that bony edge. Your other fingers curl underneath the palm, which lets you squeeze rather than shove.

Two rhythms are used. The steady hold: sink in over two or three seconds, stay while you breathe out slowly, ease off over another two seconds, rest for a breath, repeat. Or small circles at the same depth, about the width of a pea, roughly one circle per second.

How Much Pressure

Firm enough to feel a clear dull ache, light enough that you could carry on a conversation. Two honest tests. First, your breath: if you are holding it, or breathing high in the chest, back off until the breath runs by itself. Second, your shoulders: if the shoulder on the working side has crept toward your ear, that is your body bracing against you. Drop it, then press again only as deep as lets it stay down.

How Long

Hold or circle for five slow breaths, rest for one breath, and repeat three times — roughly a minute and a half on that hand. Then change hands and do the same, even if the second side feels like nothing. Two or three rounds a day is plenty. More is not better here.

When to Do It

Most people use it at the two ends of the day: once in the morning while the kettle boils, once in the evening in the chair. If you are working with a headache or a tight jaw, do it when the ache first appears rather than waiting for it to settle in. If your hands stiffen after gardening, knitting or a long drive, work both hands when you sit down afterwards rather than the next morning.

What This Won't Do

It will not make a headache disappear on command, and anyone who tells you otherwise is selling something. What people report is smaller. An ache softens at the edges. A jaw feels loose enough to let them get to sleep. A hand feels less locked after an afternoon of gripping. Some feel nothing the first few times and something by the second week. Some feel nothing ever. That is a real outcome, and it is worth saying out loud rather than pretending everybody responds.

It does nothing about the cause of a recurring headache. If your headaches are new, if they worsen week by week or if they wake you from sleep, close this page and see a doctor today. Do the same if they come with vision changes, weakness on one side, slurred speech or fever with a stiff neck. Do the same if they began after a blow to the head. The same goes for jaw pain with facial swelling or a throbbing tooth — that is a dentist's job. And for the hand itself, three things need a proper examination. They are numbness running from the neck into the fingers, a grip much weaker than the other side, and a joint that is hot and swollen. Pressure work sits alongside medical care. It does not replace any medicine you have been prescribed, and it should never be the reason you delay an appointment.

Safety First

If you are pregnant, skip this one. This point carries a caution in pregnancy going back to the classical manuals. We make no claim about what it does or does not do. There is no reason to take the chance when other points on the hand carry no such caution. Use the dip behind the knuckle of the first finger instead, and speak to your doctor if you are unsure.

Do not work on skin that is broken, burned, infected, bruised or newly scarred, and stay off any area that is hot and swollen. If you take blood-thinning medicine or bruise easily, use half the pressure you think you need. If you have had surgery on the hand or a fracture in the past few months, ask your surgeon first. Stop if the sensation turns sharp, electric or numb rather than a dull ache, and read the full safety guide before you carry on.

Questions People Ask

Where is the Hegu (LI4) pressure point? Hegu (LI4) sits on the back of the hand, in the mound of muscle between the thumb and first finger. It is not in the soft web of skin itself. It lies further back toward the wrist, level with the middle of the long bone of the first finger, on the thumb side of that bone.

How long should I press Hegu? Hold steady pressure for five slow breaths, rest for one breath, and repeat three times. That is about a minute and a half on that hand. Then do the other hand. Two or three rounds a day is plenty, and more is not better. If you are pregnant, skip this one.

Why does this spot feel sore when nothing is wrong with my hand? Muscle that works all day is often tender under firm pressure, and this small muscle opens and closes your grip hundreds of times a day. Tenderness there is common and by itself means very little. What matters is whether it settles as you hold, and whether it is the same on both hands.

Which hand should I work on? Both. Work the hand on the same side as the ache first, then do the other so the two match. Most people find one side noticeably more tender than the other, and that side usually wants a little more time.

Can I do this sitting in a waiting room or on a bus? Yes. This is one of the few points you can work anywhere, with no equipment and nothing to take off. Rest your forearm on your thigh or on an armrest so your shoulder is not doing the work, and keep your breathing quiet.

I am pregnant. Is there a substitute? If you are pregnant, skip this one. The dip behind the knuckle of the first finger and the hollow at the base of the thumb are worked in the same way and carry no such caution. If you have any doubt at all, ask your doctor first.

Other Points in This Library

Each of these sits within reach of the same hand. They are often worked in the same sitting.

This page shares general information about a traditional practice. It is not medical advice and does not replace what your doctor has given you. If you are pregnant, managing a health condition, or unsure whether this applies to you, check with your doctor first.

The whole inner edge of the foot, laid out on one page with photographs, is in The Foot Map — the free book. For every point in this library, see the full pressure point index.

(Point shown: LI4 · Hegu · Hợp Cốc.)