Ququan

What is LV8?

LV8 (Ququan) is a point at the inner end of the knee crease, on the Liver channel of traditional Chinese medicine.

Its name is usually translated as "Spring at the Crook" or "Crooked Spring", because you find it where the knee bends. In classical theory it is the he-sea point of the Liver channel and its water point, which made it a standard choice for conditions the tradition linked to the lower abdomen, the genitals and the inner knee.

It is one of the most commonly taught Liver channel points, so you will see it in videos about period pain, pelvic discomfort and inner knee aches.

Two things are worth saying once, clearly, before the rest of this page. First, a long history of use is not evidence that a point does anything; it tells you what practitioners believed, not what happens in a body. Second, a long history of use is not evidence of safety either, because the people who wrote those texts were not testing for blood clots, recent surgery or skin infection.

The honest verdict on evidence: there is essentially no human research testing LV8 by itself, by finger pressure, for any condition. LV8 turns up inside multi-point acupuncture prescriptions in some trials, which means its own contribution cannot be separated out. So treat anything you read about what LV8 "does" as tradition, not as a tested result.

What LV8 can reasonably offer is what gentle, self-applied pressure on a muscle-and-tendon area offers generally: a few minutes of slow attention, warmth and light massage around the inner knee. Some people find that pleasant and settling. That is a modest claim, and it is the one this page stands behind.

Everything described here is self-applied finger pressure on unbroken skin. Nothing on this page involves needles, heat therapy or anything that breaks the skin, and you should not attempt those on yourself.

Where is LV8 and how do you find it?

LV8 sits at the inner end of the crease behind your knee, in the soft hollow just in front of the two tendons you can feel there when the knee is bent.

• Sit down and bend the knee. Sit on a chair or on the floor with the knee bent to roughly a right angle. The crease behind the knee only appears clearly when the joint is flexed.
• Find the crease. Run a fingertip along the fold at the back of the knee, from the middle outwards towards the inner side of the leg. You are heading for the inner (medial) end of that fold.
• Feel for the two tendons. At the inner end of the crease you will feel one or two firm, cord-like tendons standing up under the skin (the hamstring tendons). They are easier to feel if you gently try to bend the knee against resistance.
• Step forward off the tendons. Slide your finger a little towards the front of the leg, off the cords and into the soft dip in front of them. That dip, right at the end of the knee crease, is LV8.
• Check the bone behind you. Just in front of the dip you can feel the hard knob of the inner thigh bone (the medial epicondyle of the femur). LV8 is in the soft tissue behind that knob, not on it.

Classical texts place LV8 at the medial end of the popliteal crease. Measured in traditional cun, it sits level with the crease, about one thumb-width of soft tissue in front of the tendons. In everyday terms: end of the knee fold, inner side, in the hollow.

If the spot feels slightly tender or doughy compared with the skin around it, you are in the right area. Do not press into the middle of the back of the knee, where the pulse and the main vessels are.

How do you apply pressure to LV8?

1. Get the knee bent and supported. Sit with your foot on the floor or cross the ankle over the opposite knee so the inner knee faces you. A relaxed leg makes the hollow easier to reach.
2. Place your thumb or two fingertips. Use the flat pad of the thumb, not the nail or the fingertip point. The pad spreads the force over a wider patch of skin.
3. Press slowly inwards. Build pressure over three or four seconds rather than jabbing. Aim towards the centre of the knee, not downwards into the back of the joint.
4. Keep it at a comfortable level. A firm, dull ache that you could hold a conversation through is enough. Sharp, burning or electric sensations mean back off immediately.
5. Hold or circle for one to two minutes. You can either hold steady pressure or make small slow circles. Breathe normally; do not hold your breath.
6. Do the other leg. Most traditional routines treat both sides. Spend about the same time on each.
7. Repeat up to two or three times a day. That is plenty. More frequent or harder pressing does not add benefit and can leave the area sore.

Stop straight away if you feel tingling, numbness or a pins-and-needles line running down the inner leg. A small nerve (the saphenous nerve) passes near this area and dislikes direct compression.

Also stop if the knee aches more after the session than before it, if the skin reddens and stays red, or if any swelling appears. Bruising means you pressed too hard.

Do not use hard tools, massage guns or knuckles on this spot. The back and inner knee sit over blood vessels and nerves with little muscle padding, so fingers only is the sensible limit.

What is LV8 traditionally used for?

• Period pain and menstrual complaints. Tradition treats LV8 as a Liver channel point for painful or irregular periods and lower abdominal cramping. Some acupressure trials for period pain show modest short-term relief, but they test other points such as SP6, in small unblinded groups, and not LV8 on its own.
• Inner knee discomfort. Because the point sits in the soft tissue of the medial knee, it has long been used for aching or stiffness there. Gentle local massage around a sore knee can feel good; that is not the same as treating the cause of knee pain, and persistent knee pain needs assessment.
• Pelvic and genital symptoms. Classical texts list LV8 for genital itching, pain and discharge, and for urinary difficulty. There is no human trial evidence supporting finger pressure here, and these symptoms can signal infection that needs real treatment.
• Men's reproductive complaints. Older texts mention seminal emission and impotence among LV8's indications. No controlled human research supports acupressure on this point for either.
• Tension and irritability. In Chinese medicine theory the Liver channel is linked with frustration and "stuck" emotion, so LV8 appears in calming routines. Any effect you notice most likely comes from sitting still, slow breathing and a few minutes of self-massage.
• Fluid and urinary themes. As the water point of the channel, LV8 was used for difficult urination and lower-body swelling. These are traditional category claims, not tested outcomes, and new swelling in one leg needs medical review rather than massage.

In short: LV8's reputation is broad and old, and its tested track record is thin. Pressing it is a low-cost comfort measure, not a treatment, and it should never replace care for pain, bleeding or infection that keeps coming back.

Are there tips for using LV8 effectively?

• Warm the area first. A warm shower or a few minutes walking makes the tendons and skin around the knee more comfortable to press. Cold, stiff tissue is more likely to feel pinchy.
• Bend, then find, then settle. Locate LV8 with the knee bent, because the crease disappears when the leg straightens. Once your thumb is in the hollow you can relax the leg slightly for comfort.
• Use the pad, not the tip. Thumb pads and the flat of two fingers spread pressure. Nails and knuckles concentrate it onto nerves and tendons, which is where soreness comes from.
• Pair it with slow breathing. Press on a slow out-breath and ease off on the in-breath. This keeps the pressure gentle and gives you a built-in timer.
• Work both legs. Traditional routines use LV8 on both sides, and doing so takes only a couple of extra minutes. It also helps you notice if one knee is far more tender, which is worth mentioning to a clinician.
• Keep it short and regular. One to two minutes a side, once or twice a day, beats a single long hard session. Tissue around the knee bruises easily.
• Track it honestly. If you are using LV8 for period cramps, note your pain level before and an hour after for a couple of cycles. Many symptoms ease on their own, and a note stops you crediting the point for ordinary timing.
• Combine with the basics. Heat packs, movement, sleep and, where appropriate, medicines recommended by your doctor do more for cramps and knee ache than pressure alone. Treat LV8 as an add-on.
• Give it a fair but finite trial. If two or three weeks of regular use changes nothing, it is reasonable to stop. Keeping going out of hope is how people delay getting a real problem looked at.

What do people get wrong with LV8?

• Expecting a cure. No acupressure point cures period pain, knee arthritis or a urinary problem. Framing LV8 as a fix is the fastest way to be disappointed and to delay useful care.
• Pressing into the back of the knee. The central popliteal hollow holds the main artery, vein and nerve of the leg. LV8 is at the inner end of the crease, in front of the tendons, not in the middle of that soft pocket.
• Landing on bone. People often press the hard knob of the inner thigh bone instead of the soft dip behind it. Bone gives no yield; if it feels hard and unmoving, slide back a little.
• Searching with the leg straight. With the knee extended the crease and tendons vanish, so the landmark is guesswork. Bend the knee first, every time.
• Going too hard. Thinking more pressure means more effect leads to bruising and a sore knee for days. Firm and dull is the target, never sharp.
• Using tools or massage guns. Percussion devices and hard knobs on a joint with thin padding over vessels and nerves are a bad idea. Fingers only here.
• Ignoring nerve signals. Tingling or numbness running down the inner leg is a sign you are compressing a nerve. That is a stop signal, not a sign the point is "working".
• Massaging a swollen, hot or newly painful knee. Sudden swelling, heat, redness or calf pain can mean infection, a flare or a clot. Those need a doctor, not pressure.
• Treating tradition as proof. LV8 is taught everywhere and listed in every classical text, and that still tells you nothing about whether pressing it changes a symptom.
• Dropping prescribed treatment. Some people stop painkillers or clinic appointments once they start a pressure routine. Add LV8 alongside your care, never instead of it.

What does the research on LV8 actually say?

There is essentially no human research testing LV8 on its own. No controlled trial of self-applied finger pressure at LV8 for period pain, knee pain, urinary symptoms or anything else has been identified, so nothing on this page can be described as a tested result.

Where LV8 does appear in the literature, it is as one point inside a larger needling prescription chosen by a practitioner, usually in studies of knee osteoarthritis or gynaecological complaints. Those trials needled several points at once. Even where a prescription helped, the design cannot tell you what LV8 contributed, and it cannot tell you what finger pressure at the same spot would do.

It is also worth knowing the shape of the wider acupressure evidence base. Most published studies are small, short, and unblinded, which means participants knew they were being treated. Symptoms such as cramping pain respond strongly to expectation, so unblinded studies tend to look more positive than they are. Self-applied techniques are harder still to test fairly, because no one can be unaware of their own thumb.

Against that background, one point does stand out in the field: PC6 for nausea and vomiting has repeatedly been tested in controlled human trials, with a consistent if modest benefit. That is the exception, and it shows what real supporting evidence looks like. LV8 has nothing comparable, and claiming otherwise would be dishonest.

What this means in practice is simple. If you press LV8 and feel better, that is a genuine experience, but you cannot attribute it to the point with any confidence. Use it as a comfort routine if you enjoy it. Do not use it as a reason to postpone investigation of pain that is new, severe, one-sided or getting worse.

If better research appears, this page will say so plainly, including if it shows no effect.