Taixi (KI3): The Inner Ankle Point for Tired Legs and Broken Nights

Where Taixi Sits

This point sits on the inner side of the ankle, in the soft hollow halfway between the top of the inner ankle bone and the heel tendon, level with the top of the bone.

This line is the deepest of the three that run up the inner leg. The traditional map starts it in the middle of the sole, curves it under the arch and brings it up behind the inner ankle bone. From there it climbs the inside of the calf and thigh and runs up the front of the trunk to the collarbone. Vietnamese and Chinese texts call it the Kidney channel. This hollow is the third stop along it, and it is the first place on the line where the channel is easy to reach and easy to press.

The old texts place it in the depression between the highest point of the inner ankle bone and the heel tendon. You do not need a measurement for this one. The two landmarks are bony and firm, and the point sits in the soft valley between them. Find the round bump on the inside of your ankle. Find the thick cord at the back of the ankle that runs down to the heel. Halfway between them, level with the top of the bump, your fingertip sinks in.

Under the skin is one of the busiest small spaces in the body. Several tendons pass behind the inner ankle bone on their way into the sole. They belong to the muscles that point the foot, hold up the arch and curl the toes. With them run an artery and a large nerve, the tibial nerve, which carries feeling to the whole sole of the foot. The artery is close enough to the surface that many people can feel it beating here. That pulse is a useful landmark: the point lies right beside it, not on it.

The nerve supply explains the sensations. The skin over this hollow is served by small branches from the saphenous nerve and the tibial nerve, carrying fibres from the lower lumbar and upper sacral roots of the spine. Because the tibial nerve itself lies deep in this hollow, a heavy press in the wrong spot can send a tingle or a buzz into the sole or toes. That feeling means move, not push harder.

Why This Spot

This hollow has firm walls on both sides, the ankle bone in front and the heel tendon behind. Your tip cannot easily slide away from it, and you can be sure you are in the right place each time. The tissue is thin. A small, firm tip reaches the tender spot without force. And it can be reached from a chair, which matters for anyone with stiff hips or knees.

It is also a place where strain gathers. Every step loads the tendons that pass here. People who have walked and stood for decades, on hard floors, in poor shoes, or with flattened arches, often find this hollow sore before they find anything else on the foot. That makes it an honest starting point. You will usually find the sting quickly.

In this tradition the point holds a special role. It is the source point of its channel, a place where the channel's own strength is said to surface most clearly. Classical writers linked this channel with the lower back, the knees, the bones, the ears, the teeth and the passing of urine, and with the reserves that wear down with age. A point that touches the whole channel from one small hollow was therefore used for complaints spread across that list, rather than one sore spot. Its name, the great stream, pictures that strength flowing out from behind the ankle.

What the Old Texts Say About Taixi

The name tells you how the point was seen. The channel begins as a spring in the sole. By the time it rounds the inner ankle it is pictured as a broad stream, wide and steady. Names on the channel map were teaching aids. They told students how the line was meant to behave at each stop, and this one says the flow is at its fullest here.

A Vietnamese reference text on the channels, by Ngô Trung Triều, lists the point for aching teeth, a sore throat, weakness of the legs, an irregular monthly cycle, discomfort of the bladder, and wetting the bed at night. The text describes it in the hollow behind the inner ankle bone, above the heel bone, where a pulse can be felt, and gives the same quick method used on this page: find the top of the ankle bone and the edge of the heel tendon, and take the dip between.

That list looks scattered until you read it through the tradition's own map. Teeth, throat, legs, bladder and night all belong to the same channel in that system. The list is not a set of promises. It is a record of where generations of practitioners reached for this hollow, and why.

In 2008 the World Health Organization published a single standard for point locations across the Western Pacific region, to settle disagreements between countries and schools. Its entry places this point on the back inner side of the ankle, in the depression between the prominence of the inner ankle bone and the heel tendon. The traditional description and the modern standard match almost word for word.

Points That Work With Taixi

The most useful partner is directly opposite, on the outer side of the same ankle. Find the outer ankle bone, slide straight back toward the heel tendon, and sink into the same kind of hollow. The two points face each other through the ankle. You can hold both at once with thumb and middle finger and squeeze gently, rubbing small circles. The outer point is commonly used for an aching lower back; the inner one for tired legs and broken nights.

The second partner is higher up the inner leg. Lay four fingers above the inner ankle bone and press into the groove right behind the shinbone at the level of the top finger. In this tradition three lines cross there, including this one. Work the higher point first, then come down to the ankle.

The third is on the sole. Curl your toes and look for the deepest hollow that forms, about a third of the way from the base of the second and third toes to the back of the heel. It is the first point of the same channel, where the stream begins as a spring, and it suits a before-bed routine because it can be worked with the foot resting on the opposite knee.

How to Find and Press Taixi

Getting Into Position

Sit on a firm chair or the edge of the bed. Rest the outer side of one ankle on the opposite knee, so the inner ankle faces up and the foot hangs loose. If your hips will not allow that, rest the foot on a low stool and lean forward. The foot must be relaxed. A foot held stiffly tightens the tendons and hides the hollow.

How to Find It

Find the highest point of the inner ankle bone with a fingertip. Then find the heel tendon, the thick cord at the back of the ankle, by pinching it lightly. Slide your fingertip straight back from the top of the ankle bone toward the tendon. Halfway across, it drops into a soft dip. If you feel a pulse there, you are in the right hollow.

That gives you the area, not yet the point. Now probe. Take a rounded-tip pressing tool, or the tip of your thumb with the nail cut short, and press small spots around the dip, a little higher, a little lower, closer to the bone, closer to the tendon. Most of it feels like ordinary pressure. One spot will sting: a sharp, pinpoint tenderness. That is the point. Keep the tip off the pulse itself, and probe fresh each session, because the sore spot can shift a few millimetres from day to day.

How to Press It

Keep the tip on the spot that stings and rub it in small, slow circles, no wider than a grain of rice, without lifting off. Aim slightly forward, toward the back of the ankle bone, rather than straight into the middle of the hollow where the nerve and artery lie.

If you use your thumb, wrap your fingers around the front of the ankle for support and let the thumb tip circle. If you use a tool, hold it like a pen, close to the tip. You can also use the pincer grip with the outer ankle point, thumb tip on the inside and middle fingertip on the outside, circling both together.

How Much Pressure

Sharp under the tip is right. That pinpoint sting tells you that you are on the point, and it should fade within moments of lifting off. Pain that stays after you lift off is not right. Neither is pain that spreads along the foot or up the leg, or an ankle that turns swollen, hot or red. Stop if any of those happen. Stop too for any electric, tingling or numb feeling running into the sole or toes, which means you are on the nerve; move the tip a little toward the bone and lighten. If you are holding your breath, ease off.

How Long

One to three minutes on each ankle. For the first few sessions keep to about a minute a side, because this hollow is often sorer than people expect. Over the following days, as the sting settles, work up toward two and then three minutes. Do both ankles, even if only one complains. Once or twice a day is plenty.

When to Do It

The evening suits this point best, as part of a short routine before bed. Most people in their fifties, sixties and seventies who sleep badly are not lying awake for hours at the start of the night. They are woken later, by an ache, a cramp, or a bladder that needs emptying. So the useful window is before you lie down.

Pass urine, sit on the edge of the bed, work this hollow on each ankle, add the sole point if you like, then lie down and let the legs go heavy. A midday session also suits tired legs after a walk or a morning on your feet. What this method does not do is press in the middle of the night. If you wake, leave the point alone and settle back down; probing for a sore spot in the small hours tends to wake you more.

What This Won't Do

It will not stop you waking, and it will not give you a full night's sleep. Night waking after fifty has many causes, from pain and cramps to medicines, a bladder that fills sooner, and the lighter sleep that comes with age. A point at the ankle reaches none of those directly. What it offers is a short, calm routine, attention for legs and feet that work hard all day, and a reliable sore spot that tells you how your feet are doing. Take it as a comfort measure, and a worthwhile one.

It will not replace a doctor either. Getting up to pass urine more than twice a night is worth raising with a doctor, particularly if it is new, or comes with burning, blood or a weak stream. Swelling in one ankle or calf only, especially if it is hot or red, needs to be seen the same day, as does swelling with breathlessness. Heel pain that stops you walking, an ankle that gives way, or numbness and burning in the soles all need proper assessment. Time spent pressing is time not spent getting those looked at.

Safety First

Do not work over skin that is broken, infected, badly bruised or rashy. Leave the ankle alone after a fresh sprain, a recent fracture or surgery, or with any plate or screw under the skin. Never press on a bulging vein, and do not rub directly on the pulse. If you have varicose veins or have ever had a clot in the leg, ask your doctor before pressing. If you have diabetes or poor feeling in your feet, check the skin of your feet and ankles first and ask your doctor before you start, because you may not feel when pressure is too much. With blood thinners or easy bruising, use the lightest pressure that still finds the sting.

Stop at once if the pain stays after you lift off, spreads, or the area turns swollen, hot or red, and stop for any electric or numb feeling. For the full list of cautions and situations where self-applied pressure is not appropriate, read the full safety guide before you begin.

Questions People Ask

Where is the Taixi (KI3) pressure point? Taixi (KI3) is on the inner side of the ankle. Find the highest point of the inner ankle bone and the thick tendon at the back of the heel. The point sits in the soft dip halfway between the two, level with the top of the bone. Probe there until one spot stings. In English it is called the Great Stream; in Vietnamese, Thái Khê.

Can I press Taixi and the point on the outer ankle at the same time? Yes. The matching point on the outer ankle sits in the same position on the other side, between the outer ankle bone and the heel tendon. Put your thumb tip on the inner side and your middle fingertip on the outer side and squeeze gently, rubbing small circles. Use less force than with one tip alone, because a pinch is stronger than it feels.

I can feel a pulse under my thumb. Am I in the wrong place? No, you are close. An artery runs through this hollow on its way to the sole, and many people can feel it beating. Shift the tip a few millimetres off the beat, toward the heel tendon or the bone, and probe there for the spot that stings. Do not rub directly on the pulse.

How long should I press KI3 before bed? One to three minutes on each ankle. Keep to about a minute a side for the first few evenings, then lengthen a little as the tenderness settles. Do both ankles, then lie down. The point belongs before bed or in the day, not in the middle of the night.

Will Taixi (KI3) stop me getting up in the night to pass urine? No one can promise that. In this tradition the point is commonly used for the bladder and for night waking, and some people find an evening routine settling. Getting up to pass urine more than twice a night is worth raising with a doctor, whatever else you try.

My ankles are puffy by the evening. Can I still press here? Mild puffiness that goes down overnight is common, and light work on clear skin is usually fine. Swelling in one ankle only, swelling that is hot or red, or swelling that leaves a deep dent when you press it is different. Leave the point alone and see a doctor.

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: KI3 · Taixi · The Great Stream · Thái Khê.)