Duiduan

What is GV27?

GV27 (Duiduan) is a Governing Vessel point on the midline of the upper lip, where the red of the lip meets the skin.

Its Pinyin name, Duiduan, is usually translated as "exchange extremity" or "extremity of the mouth". It is the second-to-last point on the Governing Vessel, the midline channel that classical texts trace up the back, over the head and down the face to the mouth. GV26 sits above it in the philtrum groove, and GV28 sits just inside the lip.

In traditional use GV27 belongs to a small cluster of mouth and nose points. Classical sources list it for mouth sores, gum and tooth pain, dry mouth, a blocked or bleeding nose, twitching of the lip, and states of agitation. It is a minor point in practice; most practitioners reach for GV26 or nearby face points first.

Two things are worth saying plainly before you read any further, and this page will not repeat them in every section. First, a long traditional record is not evidence that a point works. Points have been listed for centuries on the strength of theory and observation, not controlled testing. Second, a long traditional record is not evidence that a point is safe to press either; safety depends on your skin, your health and what is going on in the area.

The honest verdict on GV27: there is essentially no human research on this specific point for any of its traditional uses. Acupressure research as a whole is dominated by small, unblinded, short-term studies, and GV27 barely appears in it at all. That does not mean it is useless, and it does not mean it is harmful. It means nobody has tested it properly, so nothing here should be read as a treatment.

Gentle self-applied finger pressure on an intact, healthy lip is low-risk for most people. Use it as a comfort habit alongside proper dental and medical care, not instead of it.

Where is GV27 and how do you find it?

GV27 sits on the midline of your upper lip, at the small ridge where the lip's red border meets the skin above it.

• Start at your nose. Put a fingertip in the small dip under your nose, between the nostrils. This is the top of the philtrum, the vertical groove running down to your lip.
• Slide straight down the groove. Keep your finger in the midline and trace the philtrum downwards until the skin changes texture and colour at the top edge of your upper lip.
• Stop at the border. GV27 is agreed to lie at that junction in the midline, on or just above the little bump in the centre of the upper lip that some people call the lip tubercle. In old texts it is described as the point where the skin meets the red of the lip.
• Check with a mirror. This one is easier to see than to feel. Look for the point directly below the dip under your nose, on the top edge of the lip's colour change.
• Feel for the landmark, not a hollow. Unlike points in muscle, GV27 has no deep dip. You are using the lip border itself as the marker, with the upper front teeth and gum behind it.

Distances here are tiny. The whole philtrum is usually about 1.5 to 2 cm long in an adult, so GV27 sits roughly one thumb-width or less below the base of the nose, at the bottom end of that groove.

Do not confuse it with its neighbours. GV26 is higher, in the upper part of the philtrum groove, clearly above the lip. GV28 is not on the outer face at all; it is described inside the mouth, at the fold where the upper lip joins the gum. This page is about GV27 only, the outer lip-border point. If you are unsure which one a video meant, the mirror check above tells you: GV27 is the one on the colour line of the lip.

Never apply anything sharp here, and never attempt needling. Finger pressure is the whole method.

How do you apply pressure to GV27?

1. Wash your hands first. GV27 sits at the edge of your mouth, a direct route for germs. Clean hands and short, smooth nails matter more here than at most points.
2. Check the lip. Look and feel for splits, cold sores, ulcers, swelling or any broken skin. If something is there, skip the point entirely until it has healed.
3. Place one fingertip. Use the flat pad of your index or middle finger on the midline of the upper lip border, directly below the dip under your nose. One finger is enough.
4. Press gently straight back. Aim the pressure towards your front teeth, not upwards into the nose. Keep it light: about 2 or 3 out of 10, firm enough to feel contact, never enough to mash your lip against your teeth.
5. Hold or circle. Either hold steady for 5 to 10 seconds and release, or make slow, tiny circles without dragging the skin. The lip tissue is thin and moves easily.
6. Keep sessions short. Thirty to sixty seconds in total is plenty. Repeat up to two or three times a day if it feels comfortable.
7. Breathe normally and sit still. You do not need to tilt your head back or hold your breath. Comfortable posture is the whole technique.
8. Stop at the first warning sign. Stop if there is sharp pain, numbness, tingling that spreads, bleeding, stinging, or if the lip reddens and stays red.

This is self-applied finger pressure only. Do not use pens, nails, clips, electrical gadgets or anything that could break the skin, and never attempt to needle this or any other point on yourself.

If you want to try GV27 for something ongoing, such as sore gums or a dry mouth, give it a week or two of short daily sessions and judge honestly. If nothing changes, it is reasonable to stop. Keep it as an addition to brushing, flossing, fluid intake and professional dental care, never a replacement for them.

What is GV27 traditionally used for?

• Mouth and gum soreness. Classical texts list GV27 for mouth ulcers, swollen or bleeding gums and toothache in the upper front teeth. No controlled human trial has tested finger pressure here for any of these, so this stays a traditional claim. Persistent mouth sores and gum bleeding need a dentist.
• Dry mouth and thirst. The point is grouped with others said to "generate fluids" and was used for a parched mouth. There is no human evidence that pressing GV27 changes saliva production. Dry mouth is often a side effect of medicines or a sign of another condition, so it is worth asking a doctor about.
• Nasal congestion and nosebleed. Because the Governing Vessel runs past the nose, points in this cluster were used for a blocked or bleeding nose. Evidence specific to GV27 is absent. For an active nosebleed, the proven step is pinching the soft part of the nose and leaning forward, not pressing a point.
• Twitching lips or clenched jaw. Traditional indications include lip tremor and a locked jaw. No trial supports GV27 for these. New or lasting facial twitching, weakness or drooping needs urgent medical assessment, because it can signal a nerve or stroke problem.
• Agitation and mental restlessness. Older sources list GV27 among points for mania and disturbed states, reflecting the channel's head and brain associations rather than any tested effect. Mental health symptoms should be managed with a clinician; a pressure point is not treatment for them.
• Fainting and collapse. This cluster of face points has a traditional reputation in revival first aid, though GV26 carries most of that reputation, not GV27. If someone collapses or will not wake up, call emergency services immediately. Do not press a point instead.

Across every item on that list, the pattern is the same: a long written tradition and almost no modern testing. Some people find brief, gentle pressure on the lip calming or distracting, and that is a fair reason to use it. It is not a reason to expect a specific medical result.

Are there tips for using GV27 effectively?

• Use a mirror the first few times. GV27 is a visual landmark more than a felt one. Seeing the midline of the lip border once makes it easy to find by touch afterwards.
• Keep the touch light. Lip tissue is thin, with teeth and bone right behind it. Light contact is more comfortable and no less traditional than hard pressure, which just risks a bruised lip.
• Clean hands, every time. This is the single most useful habit for a mouth point. Touching the lip border with dirty fingers is a realistic way to pick up or spread an infection.
• Dry the lip first. A fingertip slides on a wet or balm-covered lip and ends up dragging the skin. Blot the area and the pressure stays where you put it.
• Pair it with the obvious basics. If you are using GV27 for a dry mouth, drink water and check your medicines with a pharmacist. If it is for gum soreness, brush gently and book the dentist. The point is an add-on.
• Keep sessions short and regular. A minute at a time, a couple of times a day, beats one long session. Long pressing on the lip is uncomfortable and achieves nothing extra.
• Try it when you are already calm. If you are using it as a self-soothing habit, practise it in a quiet moment first. A technique you only reach for in a panic rarely feels helpful.
• Write down what happens. Note the symptom, the date and a score out of ten before and after. Two weeks of notes will tell you far more than a video will.
• Skip the point rather than force it. If the lip is sore, chapped or healing, leave GV27 alone that day. Nothing is lost by waiting.

One more practical note: avoid pressing GV27 right after eating or drinking anything acidic or spicy, when the lip may already be mildly irritated.

What do people get wrong with GV27?

• Expecting a cure. The commonest mistake by far. GV27 has no tested power to cure toothache, mouth ulcers, nosebleeds or anxiety, and anyone promising that is overselling it.
• Confusing it with GV26. GV26 lies higher, in the philtrum groove well above the lip. GV27 is on the lip's colour border itself. Many videos use the names loosely, so check the landmark rather than the label.
• Confusing it with GV28. GV28 is described inside the mouth at the fold between the upper lip and the gum. GV27 is on the outside. Do not go poking inside your mouth looking for this page's point.
• Pressing far too hard. Crushing the lip against the front teeth causes a bruised, tender lip and sometimes a split. Firm contact is all that is ever intended.
• Using a nail or an object. A fingernail, pen cap or similar can break the lip skin. This point is for the soft pad of a finger and nothing else.
• Pressing over a cold sore. Rubbing an active herpes blister can spread the virus to other parts of the lip, the fingers or the eye. Wait until it has fully crusted and healed.
• Dirty hands. Going straight from a phone, a keyboard or a gym handle to the mouth border is an easy way to introduce germs.
• Delaying the dentist. Pressing a point while an abscess or a cracked tooth gets worse is the kind of delay that turns a small problem into an emergency.
• Using it on a collapsed person. Face points have an old first-aid reputation, but someone who is unresponsive needs emergency services and, if trained, CPR, not finger pressure.
• Doing it for too long. Ten minutes of lip pressing does not amplify anything. It just leaves the area sore.

What does the research on GV27 actually say?

No useful human research on GV27 specifically was found. There are no controlled trials of finger pressure at this point for mouth ulcers, gum pain, dry mouth, nasal symptoms, agitation or anything else in its traditional list.

What exists in this region of the body is research on its neighbour GV26, which has been studied in resuscitation and anaesthesia contexts, mostly with needling and often in animals rather than people. That work is about a different point, used a different way, and it does not transfer to self-applied pressure on GV27. Treating it as support for this point would be dishonest.

It is worth knowing the shape of acupressure evidence generally, because it sets expectations. The better-studied points have small, short, unblinded trials, where participants know they are being treated and outcomes are self-reported. PC6 and nausea is the clearest exception in the whole literature, with repeated controlled trials behind it. GV27 is at the opposite end of that range: a listed classical point with essentially no modern testing.

What does an evidence gap mean in practice? It does not prove GV27 does nothing. It means that if you feel better after using it, nobody can currently tell you whether that came from the point, from sitting still and breathing for a minute, or from the symptom easing on its own. For something minor and self-limiting, that may not matter to you. For a persistent sore mouth, a lasting dry mouth, repeated nosebleeds or new facial twitching, it matters a great deal, because those need a real diagnosis.

If that changes and properly controlled human trials of GV27 appear, this page will be updated. Until then, the honest summary is: long tradition, no tested effect, low risk when pressed gently on healthy skin.