Daling

What is PC7?

PC7, called Daling, is a Pericardium channel point in the middle of the front wrist crease, between two tendons.

The name is often translated as Great Mound. In classical Chinese medicine PC7 is the source point of the Pericardium channel, and it appears in almost every teaching curriculum. Tradition groups it with the points said to settle the heart and mind, and it is also named for problems of the wrist and palm itself.

Traditional standing tells you that a point has been used for a long time. It does not tell you that the point works, and it does not tell you that pressing it is safe for you. Those are separate questions, and this page answers them separately. You will not see that warning repeated in every section below, so take it as applying throughout.

The honest verdict on the evidence: there is very little good human research on PC7 on its own. Most studies that use it are needling trials where PC7 is one point in a larger recipe, so they cannot tell you what finger pressure on PC7 alone does. That is different from PC6, a point further up the same channel, which has genuinely decent trial evidence for nausea and vomiting.

What PC7 realistically offers a self-care reader is a brief, low-cost, low-risk calming routine at a spot that is easy to find and easy to use anywhere. Some people find that useful during stress or before sleep. Treat any benefit as personal and modest rather than proven.

One anatomical fact matters more than any tradition here. The median nerve runs through the carpal tunnel directly under this spot, close to the surface. That is why the pressure described on this page is gentle, brief and stopped immediately if your hand tingles or goes numb.

Where is PC7 and how do you find it?

PC7 sits in the middle of the crease where your palm meets your forearm, in the dip between the two tendons that stand up when you clench.

• Turn the arm over. Rest your forearm on a table with the palm facing up and the hand relaxed. Working on a surface stops you from pressing harder than you mean to.
• Find the right crease. You may see two or three creases at the wrist. Use the one closest to your palm, the last crease before the hand begins.
• Make the tendons show. Clench your fist and bend the wrist slightly toward you. One or two firm cords pop up in the middle of your inner wrist.
• Drop into the hollow. PC7 is on that palm-side crease, in the soft gap between those two cords, roughly halfway across the width of your wrist.
• If you see only one cord. About one person in seven is missing one of these tendons, which is normal. In that case simply use the midpoint of the crease, between the bony bumps at each edge.
• Check you are off bone. You should feel a soft, slightly springy dip. If your finger is on a hard knob, you have slid toward the thumb side or the little-finger side. Move back to the centre.

A common mix-up is worth settling now. PC6 is on the same line but about 2 cun higher, which is roughly three finger-widths or 4 to 5 cm up the forearm from the crease. PC7 is on the crease itself, not up the arm.

Measure with your own hand, not someone else's. A cun is scaled to your body, so your thumb-width is the right ruler for your wrist. Nothing on this page involves anything entering the skin.

How do you apply pressure to PC7?

1. Set up first. Wash and dry your hands, trim or avoid sharp nails, and rest the forearm palm-up on a table or your lap. Sit somewhere you can stay still for a couple of minutes.
2. Use a finger pad. Place the pad of your opposite thumb, or index finger, flat on the hollow. Never use a knuckle, a pen cap, a massage tool or anything with a point.
3. Press straight down, gently. Aim for light to moderate pressure only, around 3 out of 10 where 10 is the most you could bear. This spot sits over a nerve, so it needs less force than a shoulder or a calf.
4. Hold or circle. Either hold steady for 20 to 30 seconds, or make small slow circles for the same time. Breathe slowly while you do it rather than holding your breath.
5. Release and repeat. Lift off for a few seconds, then repeat two or three times. Keep the whole session on one wrist to about 2 minutes.
6. Do the other wrist. The point exists on both arms. Treating both is usual, and it also stops you from overworking one side.
7. Keep it occasional. Two or three short sessions a day is plenty. More pressing is not better here, and repeated hard pressure over a nerve can irritate it.

Stop straight away if you feel tingling, pins and needles, numbness, electric shooting into the thumb or fingers, or any sharp pain. Those are nerve signals, not a sign that the point is working.

Also stop if the area is sore afterwards, if the skin marks or bruises, or if you feel faint or lightheaded. Mild warmth or a dull ache under the finger that fades within a minute is the normal limit.

Finger pressure is the only method covered here. Nothing on this page involves needles, heat applied to the skin, or any technique that breaks the skin.

What is PC7 traditionally used for?

• Anxiety and agitation. Tradition describes PC7 as calming the spirit, and it is widely taught for restlessness and a sense of unease. Human evidence for acupressure and anxiety exists but is weak: trials are small, short, and usually cannot blind participants, and almost none test PC7 by itself.
• Trouble sleeping. PC7 appears in classical and modern point selections for insomnia. Reviews of acupressure for sleep report small benefits, but the studies are mostly low quality and use multi-point routines, so no honest claim can be made for this point alone.
• Palpitations and chest tightness. The Pericardium channel is linked to the heart in traditional theory, and PC7 is named for a thumping, uneasy chest. There is no good trial evidence that pressing it changes heart rhythm. New, severe or recurring palpitations need a doctor, not a point.
• Wrist and palm discomfort. PC7 sits right where carpal tunnel symptoms are felt, and acupuncture trials for carpal tunnel syndrome have included points in this area. Results are mixed and reviews rate the evidence as low certainty. Gentle self-massage may feel pleasant, but firm pressure can make nerve symptoms worse.
• Nausea and stomach upset. Some sources extend the Pericardium channel's nausea reputation to PC7. The trial evidence for nausea belongs to PC6, a different point higher on the forearm, and should not be borrowed for PC7.
• Stress-moment grounding. Many people simply use PC7 as a quiet, portable pause: a known spot, a slow breath, 30 seconds. Any benefit here plausibly comes from the pause and the slow breathing as much as the point, and that is a reasonable thing to use it for.

In short, tradition gives PC7 a wide brief, and research gives it very little direct support. Use it as a comfort measure alongside proper care for anything that matters.

Are there tips for using PC7 effectively?

• Go lighter than you think. The median nerve runs just under this spot. Gentle, brief pressure is the safe version of PC7, and heavy digging is the version that causes problems.
• Let the breath do half the work. Pair each hold with a slow out-breath, longer than the in-breath. If PC7 helps you settle, the breathing pattern is likely doing a real share of it.
• Pick a consistent moment. Attaching it to a routine, such as sitting down on the train or switching off the bedside lamp, makes it far more likely you will actually use it.
• Work both wrists. Two short turns on alternating sides beats one long session on one wrist, and it spreads the load.
• Keep your nails out of it. Use the flat pad of the finger. A nail edge on thin wrist skin can scratch or bruise, especially if you take blood thinners.
• Do not use oil here. You need a stable, controlled contact. A slippery finger tends to slide and then be pressed harder to compensate.
• Try a two-week test. Note your sleep or stress on a 0 to 10 scale before and after, for a fortnight. If nothing shifts, stop. There is no reason to keep doing something that does nothing for you.
• Mind the wrist you overuse. If typing or gaming already makes your wrist ache, fix the setup and take breaks. Pressing a sore, overloaded wrist is not a substitute for resting it.
• Keep your real treatment running. If you take medication for anxiety, sleep or a heart condition, carry on exactly as prescribed and discuss any changes with your prescriber first.
• Stop at the first tingle. Pins and needles mean back off, not press on. Ending early costs you nothing.

What do people get wrong with PC7?

• Expecting it to fix the problem. People sometimes approach PC7 as a replacement for treatment of anxiety, insomnia or a heart complaint. The evidence does not support that, and no honest source will promise you an outcome from a point.
• Confusing PC7 with PC6. PC6 is about three finger-widths up the forearm from the crease and has far better evidence, specifically for nausea. If nausea is your reason, you want PC6, not the crease point.
• Pressing far too hard. The idea that pain means progress is wrong anywhere, and especially here, because a major nerve lies just beneath. Hard pressure risks numbness and lingering soreness.
• Ignoring tingling. Pins and needles into the thumb and first two fingers is a nerve being squeezed. That is a signal to stop, not evidence you found the exact spot.
• Landing on bone. Sliding toward either edge of the wrist puts the finger on a hard bony knob instead of the soft gap between the tendons. You get nothing but a bruise.
• Using a tool. Pens, pressure clips and hard plastic gadgets concentrate force into a small area over the nerve. Fingers only.
• Pressing an injured wrist. A fresh sprain, a suspected fracture, a hot swollen joint or a healing surgical scar all need leaving alone and assessing properly.
• Treating chest symptoms at home. Chest pain, a pounding heart with dizziness or breathlessness are reasons to seek urgent medical help, not reasons to sit and press your wrist.
• Marathon sessions. Twenty minutes of continuous pressure is not a stronger dose. Short sessions, a few times a day, is the sensible pattern.

What does the research on PC7 actually say?

There is no body of good human research on finger pressure applied to PC7 on its own. That is the plain answer, and it has not changed with the current literature.

Where PC7 does appear in studies, it is nearly always as one point inside a larger needling protocol. Randomised trials of acupuncture for carpal tunnel syndrome have used points on the inner wrist in this region, with mixed results, and systematic reviews generally describe the evidence as low or very low certainty because the trials are small and hard to blind. Those trials used needles, so they say nothing reliable about what pressing the spot with a thumb does.

The same pattern holds for insomnia and anxiety. Reviews of acupressure for sleep and for anxious feelings report small short-term improvements, but the studies tend to be small, unblinded, often without a convincing sham comparison, and they combine several points at once. When a study presses five points and reports a benefit, it cannot tell you that PC7 was responsible.

It is worth naming the contrast, because it shows what real evidence looks like. PC6, higher on the same forearm, has been tested repeatedly for nausea and vomiting, including wristband studies in pregnancy, after surgery and during chemotherapy. Those trials are numerous enough that reviewers accept a genuine, if modest, effect. PC7 has nothing comparable behind it.

What that means for you is simple. Treat PC7 as a low-risk comfort habit with an unproven effect, not as a treatment. If something improves while you use it, that is worth having, but keep medical care and prescribed medication in place for anything serious. If a source tells you this point reliably resolves anxiety, insomnia or heart symptoms, they are going well beyond what the research shows.