Houxi (SI3): The Hand Pressure Point for Lower Back Pain and a Stiff Neck

Where Houxi Sits

This point belongs to what Vietnamese traditional medicine calls the Small Intestine channel. It is one of fourteen pathways the old system maps across the body. That pathway is described as beginning at the outer corner of the little fingernail. It runs up the outer edge of the hand and forearm and over the point of the elbow. Then it crosses the shoulder blade to the base of the neck. Our point is the third stop along it, counting from the fingertip.

In plain anatomy it sits on the outer edge of the hand, at the near end of the knuckle at the base of the little finger. Under that knuckle is the long bone that runs from your wrist to the little finger (the fifth metacarpal). Under your fingertip lies the small muscle that pulls the little finger out sideways, and beneath that the bone. The skin here is a boundary. The pale, thick skin of the palm meets the thinner skin of the back of the hand. The old texts called that line the border between the red and the white flesh, a surprisingly exact description once you look at your own hand.

Sensation arrives through a small branch of the nerve that runs along the little-finger side of the arm (the ulnar nerve). It carries fibres from the eighth neck root and the first root of the upper back. The nerve supply of this corner of the hand comes from the bottom of the neck.

To find it, curl your fingers in as though holding a tennis ball loosely. A crease deepens across the palm, the one nearest your fingers. Follow it with the thumb of your other hand, moving outward toward the little-finger side. Stop where the crease runs out of palm and ends at the edge of the hand. That end, where palm skin turns into back-of-hand skin, is the spot. Open your hand and the crease disappears, but the spot does not move. It stays in the small dip behind the knuckle of the little finger.

Why This Spot

Anatomy gives one plain reason this place answers a thumb so clearly. There is very little padding between skin and bone, and a nerve branch runs close to the surface. So pressure registers precisely against a firm backstop. The small muscles of this pad also work constantly, with every walking stick, steering wheel and shopping bag. They stiffen quietly with age and use.

The traditional reasoning is a different kind of explanation and should be labelled as one. In this tradition, eight points on the arms and legs are described as gateways to eight deeper vessels running through the trunk. This is one of those eight. The vessel it pairs with is the Governing Vessel, mapped as running up the midline of the back, from the base of the spine to the back of the skull. That pairing is why a point on the side of the hand is the first one reached for when the lower back aches or the neck locks. In this tradition it is an access door to the line of the spine. The nerve supply here happens to come from the base of the neck as well. Nobody should call that proof of anything.

What the Old Texts Say About Houxi

The earliest surviving description sits in the Spiritual Pivot (Lingshu), the second half of the Yellow Emperor's Inner Classic, compiled around the start of the common era. Its chapter on the root and transport points names, for each channel, the places where the flow is described as welling, gliding, streaming, running and pouring. For this channel it puts the third, the stream, at the base of the little finger on its outer side. That is the oldest written address for the spot, and it matches what your thumb finds today.

Three centuries later Huangfu Mi assembled the Systematic Classic of Acupuncture and Moxibustion (Zhenjiu Jiayi Jing, third century). It was the first book to gather the scattered classical material into an ordered manual. Its entry lists, among the uses of this place, a neck and nape that are stiff and will not turn. It also lists aching across the shoulder blade, an arm that is hard to lift, headache, ringing in the ears, and night sweats. Note what that list is. It records what practitioners of the era reached for. It is not a record of results, and no honest reader should turn it into one.

In 1026, under imperial order, Wang Weiyi produced the Illustrated Manual of the Bronze Man (Tongren Shuxue Zhenjiu Tujing). In 1027 two hollow bronze figures were cast with the points marked, so students could be examined against a standard object rather than a teacher's memory. The manual's entry repeats the address almost word for word. It puts the point at the little finger's base, in the depression on the outer side, at the border of the red and white flesh.

The grouping that made this point famous came later. In the thirteenth century Dou Hanqing set out the system of eight paired gateway points, and this one was matched with the vessel of the spine. From then on it appears in the back-and-neck section of every major manual. By 1742 the Golden Mirror of Medicine (Yizong Jinjian) was compiled for the Qing court. By then it was taught as the hand's door to the back. What this article describes is a plain, thumb-only version of a very old habit.

Points That Work With Houxi

The bony bump on the wrist edge. Slide along the same outer edge toward the wrist until you meet a small hard bump. The dip past it is used for stiffness that sits high, in the neck and the top of the shoulder. Add it when your trouble is more neck than back.

The hollow before the knobby forearm bone. Carry on toward the arm until you feel the rounded end of the forearm bone. The hollow before it is used for the wrist and for aching that runs up the arm.

The groove between the last two knuckles. Turn your hand over. Put a fingertip in the gap between your ring-finger and little-finger knuckles. Then slide back toward the wrist until it drops into a groove. A good partner when your head will not turn to one side.

Prefer to work through your feet? The same lower-back ache has its own spot there: see the foot point for lower back pain. For a neck that will not turn, read about the point on top of the big toe.

How to Press Houxi With Your Thumb

Getting Into Position

Sit down. A dining chair beats an armchair: you want your back upright and your feet flat rather than sunk into cushions. Rest the working hand in your lap, on the arm of the chair, or on the table. Anywhere it can be still without you holding it up will do. Let that shoulder drop.

How to Find It

Curl the working hand into a loose fist so the palm crease nearest your fingers stands out. Lay the thumb of your other hand on that crease. Walk it outward toward the little-finger side, a few millimetres at a time, until it reaches the edge of the hand. You are level with the crease, behind the knuckle at the base of the little finger.

Now press in gently and move your thumb tip in a circle no wider than a pea. In the right place most people feel a deep, dull, nagging ache that seems to belong to a wider area than the thumb covers. Some describe a gritty or ropey feeling, like a small knot rolling against bone. Either of these means you are on it. A bright sting at skin level means you have slipped onto the knuckle. Move back toward the wrist and search again.

How to Press It

Use the pad of your thumb, not the tip and not the nail. Press inward toward the bone beneath and slightly toward the centre of the hand, as though meeting a finger pressing from the palm side. Keep that direction steady, so pressure goes into bone rather than skidding along skin. Two rhythms work. A hold: sink in over two seconds, stay at depth while you breathe out, release over two seconds, rest, repeat. Or a slow circle, about one per second, moving the skin over the bone without sliding across the surface.

How Much Pressure

Aim for the level where the ache is unmistakable but you could carry on a conversation through it. Two tests. First, your breath. If you are holding it, or breathing in short shallow sips, back off until your breathing goes long and quiet again. Second, your shoulder. If the shoulder of the pressing arm has crept toward your ear, the arm is bracing and pressure has turned into force. Let it drop and press less. Soreness that fades within a minute of stopping is normal. Bruising is not, and means you were too heavy.

How Long

Hold or circle for five slow breaths, around thirty to forty seconds. Rest for one breath. Do three rounds on one hand, then change hands and do three on the other. That is about four minutes for both. Do not chase a longer session. This point turns sore with overwork, and a tender hand helps nobody.

When to Do It

The most useful moment is before stiffness sets, not after it has taken hold. For most people with an aching back that means first thing in the morning while the kettle boils. Do it again in the early evening, once the day's sitting and standing has accumulated. If your neck tightens at a desk or in a car, do a round before you sit down rather than after you get up.

What This Won't Do

Let us be straight about the limits, because you deserve that more than encouragement. Pressing your hand does not change the structure of your spine. Suppose a disc has bulged, or the joints of your lower back have worn, or a nerve is being squeezed by bone. This does nothing to that bone, disc or joint. Nothing you do with a thumb will alter what shows on a scan. What people report is a loosening of the guarding, the reflexive tightening that builds around a sore back and often hurts as much as the original problem. That is real and worth having. It is also smaller than a solution, and anyone telling you otherwise is selling something.

Some signs mean this article is the wrong place to be, and they matter more than anything else on this page. Suppose your back pain runs down one leg with numbness, tingling, or a leg that feels weak, such as a foot catching on steps or a knee giving way. That is a nerve problem and belongs with a doctor promptly. The same goes for any loss of control over bladder or bowels. See a doctor too for numbness around the saddle area between your legs. The same goes for back pain with unexplained weight loss or fever, and night pain that wakes you and settles in no position. Back pain after a fall, especially if you have been told your bones are thin, needs an examination rather than a hand routine. A hand point is a fine thing to add to your day and a very poor thing to hide behind.

Safety First

Keep pressure off skin that is broken, inflamed, infected, burned or recently cut, and off any area of surgery until the surgeon says so. If you take blood-thinning medication, or bruise easily, stay light and stop at the first sign of a mark. If the hand itself is the problem, such as a hot swollen joint, a sprain or a mending fracture, leave it alone and work the other hand only. This point is not on the list of places to avoid during pregnancy. Even so, if you are pregnant, ask your midwife or doctor before adding any pressure practice.

This is general wellness education, not medical advice. It is not a substitute for care from your doctor. If you have a medical condition, are pregnant, or take medication, check with your doctor first. Keep taking exactly what your doctor prescribed. This is something you do in addition, never instead. Before you start, read the full safety guide.

Questions People Ask

Where is the Houxi (SI3) pressure point? Houxi (SI3) sits on the outer edge of your hand, behind the knuckle at the base of the little finger. Close a loose fist so the palm crease nearest your fingers stands out. Follow it outward with your other thumb until it stops at the edge of the hand. That end is the spot.

How long should I press Houxi? Hold or circle for five slow breaths, about thirty to forty seconds. Rest for one breath. Do three rounds on one hand, then change hands and do three on the other. That is about four minutes in all. Do not chase a longer session, because this point turns sore with overwork.

Which hand should I press if my back hurts on one side? Work both hands. Many people find the hand on the same side as the ache feels more tender, and that hand is worth a second round. But the point is small and the cost of doing both is one extra minute, so do both.

How soon would I notice anything? Most people who notice something notice it inside the first minute, usually as a small loosening rather than a dramatic change. Some feel nothing the first few times and something on the fourth or fifth. And some feel nothing at all. That is an honest answer, not a soft sell.

My hands are stiff and my grip is weak. Can I still do this? Yes. You do not need to close a strong fist. A loose curl is enough to raise the crease. If your thumb is sore, press with the knuckle of your bent first finger instead, or rest the edge of your hand on the arm of a chair and lean a little weight onto it.

Can I do this while I am on medication for my back? Keep taking exactly what your doctor prescribed. This is something you do in addition, never instead. If you are on medication that thins the blood, or you bruise easily, keep the pressure light and tell your doctor what you are doing.

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: SI3 · Houxi · Hậu Khê.)