Jianshi

What is PC5?

PC5, or Jianshi, is a point on the inner forearm, about four finger-widths above the wrist crease, between two tendons.

It belongs to the Pericardium channel, which runs from the chest down the middle of the inner arm to the middle fingertip. In classical theory PC5 is one of that channel's five "transport" points, and older texts link it to the chest, the stomach and the mind. It is a standard teaching point, so you will see it in most point charts and in many online videos.

Traditional standing is not evidence that a point works, and it is not evidence that it is safe to press. Those are two separate questions, and this page keeps them apart. Age and popularity tell you that generations of practitioners used PC5, nothing more.

The honest verdict on the evidence is short: there is essentially no good human research on PC5 used on its own. The well-known nausea research on the Pericardium channel was done on PC6, a different point two finger-widths lower down the same forearm. PC5 is sometimes included in multi-point treatment protocols, which means no one can say what PC5 itself contributed.

So what is reasonable to expect? Firm thumb pressure on a soft spot of your forearm is low-risk for most people and may feel calming, in the way that any slow, attentive self-massage can. That is a modest claim, and it is the one the evidence supports. It is not a treatment for heart problems, stomach disease, seizures or panic disorder, and pressing it should never replace care you actually need.

This library covers self-applied finger pressure only. Nothing here describes needling, and you should not attempt needling, moxibustion or cupping on yourself from any source.

Where is PC5 and how do you find it?

PC5 sits on the palm side of the forearm, three cun (about four finger-widths) above the wrist crease, between the two tendons you can feel running up the middle.

• Start at the wrist crease. Turn one arm palm-up and find the deepest crease where the hand meets the forearm. This is your zero mark.
• Make the tendons show. Touch your thumb and little finger together and lift your wrist slightly. Two cords usually pop up in the middle of the forearm, a finger-width or so apart.
• Measure up four finger-widths. Lay the four fingers of your other hand across the forearm, index finger touching the wrist crease. PC5 is at the far edge of your little finger, roughly 6 cm up from the crease on an average adult arm.
• Settle into the gap. Slide your thumb-tip into the soft channel between the two cords at that level. You should feel give, not bone.
• Check the feel. Steady pressure there often gives a dull ache or a heavy, spreading feeling. Sharp, electric tingling into the palm means you are leaning on the nerve, so ease off.
• Know its neighbours. Two finger-widths above the crease is PC6, and PC7 sits on the crease itself. PC5 is the one further up the arm.

Use your own fingers to measure, not someone else's. A cun is a proportional unit, so a tall person's four finger-widths cover more ground than a child's, and that is intended.

If you cannot feel two distinct tendons, do not worry. In some people one of them is missing entirely. Use the midline of the inner forearm at that height and you will be close enough for finger pressure.

How do you apply pressure to PC5?

1. Get comfortable first. Sit with your forearm resting palm-up on a table, a cushion or your lap. A supported arm lets the muscles soften, so you are not fighting your own tension.
2. Place the thumb. Use the pad of the opposite thumb, not the nail, and set it in the gap between the tendons at the four-finger mark. Wrap your fingers lightly round the back of the forearm for support.
3. Build pressure slowly. Press straight down over two or three seconds until you feel a firm, dull ache, roughly a three or four out of ten. It should feel like a deep stretch, never like pain you have to brace against.
4. Hold or circle. Keep steady pressure for 30 to 60 seconds, or make small slow circles without sliding over the skin. Breathe out slowly as you press and let your shoulder drop.
5. Release and repeat. Lift off gently, rest for a few breaths, then repeat two or three times. Then do the same on the other forearm so both sides get equal attention.
6. Keep sessions short. A few minutes per arm, up to two or three times a day, is plenty. More pressure and longer holds do not buy you more; they mostly buy you a bruise.
7. Stop when your body says so. Stop immediately for electric tingling into the palm or fingers, numbness, sharp pain, or any new swelling or redness. Stop too if the skin is sore from an earlier session.

Finger pressure only. Do not use pointed objects, pens, hard massage tools pressed at full force, or anything that breaks or marks the skin.

Wrist acupressure bands can also sit over this part of the forearm. They are designed for PC6 and are a reasonable low-risk option, but loosen them if your hand feels cold, tingly or puffy.

What is PC5 traditionally used for?

• Nausea and vomiting. The Pericardium channel is the classic place to work for a churning stomach, and PC5 is named alongside PC6 in older texts. The decent human trial evidence here belongs to PC6, not PC5, so treat PC5 as the lesser-studied neighbour rather than an equal.
• Chest tightness and palpitations. Tradition links this channel to the chest and the "heart-mind", and PC5 appears in old prescriptions for fullness in the chest and a racing heartbeat. There is no human research showing finger pressure here changes heart rhythm or chest symptoms, and new chest symptoms need a doctor, not a thumb.
• Anxiety and restlessness. Practitioners commonly use PC5 for agitation and a busy mind. Slow, attentive self-massage with controlled breathing does calm some people, but that benefit is hard to separate from the breathing and the pause itself, and no trial has isolated PC5.
• Fevers that come and go. Classically PC5 was a famous point for malarial-type fevers with alternating chills and heat. This is a historical claim from a world without modern diagnosis; fever with rigors is a medical matter and acupressure has nothing useful to offer it.
• Speech and tongue complaints. Some classical lists give PC5 for a stiff tongue or sudden loss of voice. There is no modern human evidence for this, and sudden speech difficulty can signal a stroke, so it is a red flag rather than a self-care target.
• Local forearm ache. Pressing a tender spot in a tight forearm often eases the ache for a while, which is ordinary soft-tissue massage rather than anything specific to PC5. It is the most straightforward thing the point reliably does.

In plain terms: PC5 has a long traditional reputation and very little direct testing. Use it as a pleasant, low-cost self-care habit, and judge it on how you actually feel rather than on what the chart promises.

Are there tips for using PC5 effectively?

• Mark the spot first. Find PC5 with the tendon trick and the four-finger measure before you start pressing, then keep your thumb there. Hunting around mid-session means you spend the time massaging your forearm in general.
• Let the breath lead. Press on a slow out-breath and ease off on the in-breath. Most of the settling people report comes from slow breathing, so build it in deliberately.
• Work both arms. Treat the left and right forearm the same way, one after the other. It takes under five minutes and keeps you from overworking one tender spot.
• Stay at a four out of ten. Aim for a dull ache you could hold a conversation through. Pressure that makes you wince adds no benefit and raises the chance of bruising.
• Trim your thumbnail. A long nail turns broad pressure into a point and can nick the skin, especially on thin or older skin. Use the flat pad every time.
• Pick a consistent moment. Attach it to something you already do, like sitting down after work or settling into bed. Habits built on existing routines survive longer than ones built on good intentions.
• Keep a two-week note. Jot a one-line rating of the symptom you are tracking before and after. If nothing has shifted in two weeks, that is a real answer and worth respecting.
• Use a band for travel sickness. If your interest is motion sickness, an elastic acupressure band on the lower forearm is easier than holding a thumb in place on a moving boat or car. Loosen it if your fingers tingle or swell.

One practical note: warmth helps. Doing this after a shower, or with a warm hand, makes the tendons easier to feel and the pressure more comfortable.

What do people get wrong with PC5?

• Expecting a cure. Acupressure is not a treatment for heart disease, epilepsy, anxiety disorders or stomach illness, and no point cures anything. Going in expecting a fix leads to disappointment and, worse, to delayed care.
• Mixing PC5 up with PC6. PC6 is two finger-widths above the wrist crease; PC5 is four. The nausea research people quote was done on PC6, so if seasickness is your goal, use the lower point deliberately.
• Borrowing someone else's measurements. Cun are proportional to your own body. Measuring a friend's arm with your fingers, or following a video presenter's hand, puts the spot in the wrong place.
• Digging for a nerve sensation. Some people press harder and harder chasing an electric zing into the palm. That zing is the median nerve complaining, and it is a signal to back off, not a sign you found the point.
• Pressing through chest symptoms. New chest pain, pressure, breathlessness or a pounding heart is a reason to get medical help the same day, or to call emergency services. Rubbing a forearm point while symptoms build is the most dangerous mistake on this page.
• Pressing on damaged skin. Working over a graze, rash, burn, bruise or fresh tattoo on the inner forearm irritates it and can drive infection into broken skin. Wait until the skin is fully intact.
• Copying needling from a video. Clips that show a practitioner inserting a needle at PC5 are showing a clinical procedure, not a home technique. Never attempt needling, moxibustion or cupping on yourself.
• Marathon sessions. Twenty minutes of hard thumb work leaves a tender, bruised forearm and no extra benefit. Short and regular beats long and heavy every time.

What does the research on PC5 actually say?

The honest answer is that no useful human research on PC5 by itself was found. There is no body of controlled trials testing finger pressure at Jianshi for nausea, anxiety, palpitations or anything else.

What exists is adjacent. PC5 shows up as one point among several in acupuncture treatment protocols in some clinical studies, usually combined with points such as PC6, HT7 or ST36. When a study needles five points together and the group improves, there is no way to tell what any single point contributed. Those trials cannot be read as evidence for PC5.

The research people usually have in mind belongs to PC6, the point two finger-widths above the wrist crease. PC6 stimulation for nausea and vomiting has been tested in a substantial number of randomised trials and pooled reviews, including studies in pregnancy sickness, post-operative nausea and motion sickness. The overall picture there is genuinely encouraging, though many of the individual trials are small and blinding is difficult. That evidence is about PC6. It does not automatically transfer to the point four centimetres further up the arm, even on the same channel.

There is also a general limitation worth knowing. Most acupressure trials are small, short and unblinded, because a participant can tell whether a thumb is pressing their forearm. Expectation and attention produce real, measurable changes in how people rate symptoms like nausea and anxiety, so unblinded results tend to look better than the technique really is.

What this means for you is simple. Treat PC5 as untested rather than disproven. It is a low-risk thing to try on yourself, and if it helps you feel calmer, that is a legitimate personal result. It is not a basis for skipping medication, delaying a diagnosis or treating a condition at home.