The Gate of the Thigh. Biguan (ST-31) is the key local point for the hip and upper leg — opening the 'gate' of the lower limb, dispelling Wind and Dampness, and restoring movement when the leg is weak, numb or painful.
Contraindications
ST-31 is a safe and commonly used point. Keep within the recommended depth and use standard clean-needle technique.
Name & story
The name 髀关 Biguan means 'Thigh Gate'. 髀 (bì) is the thigh or hip region, and 关 (guān) is a gate or pass — the kind that controls entry and movement. Sitting close to the hip joint, where the lower limb truly begins, this point is the gateway through which Qi and Blood (Xue) flow down into the leg. When that gate is blocked — by Cold, by Dampness, by Wind — the leg becomes stiff, numb or weak. Opening it lets movement return.
Point family & character
Biguan (ST-31) belongs to the Stomach Meridian (ST), a channel described in the Spiritual Pivot as 'abundant in Qi and Blood'. It has no special categorical designation (no He-Sea, Xi Cleft or Yuan Source status), but it is a highly valued local point for the hip and thigh region.
Five-element dynamics
The Stomach Meridian (ST) is the Yang channel of the Earth element — rich in Qi and Blood (Xue) by nature. This abundance makes its points especially effective at promoting circulation in the limbs. At ST-31, right at the 'gate' of the leg, that Qi and Blood (Xue) can be directed powerfully into the lower limb — warming it, nourishing it and clearing whatever obstruction has settled there, whether Wind, Cold or Dampness.
Location
Find the anterior superior iliac spine (the bony point at the front of the hip). Draw a vertical line straight down from it. Then draw a horizontal line at the level of the lower border of the pubic symphysis — roughly the same height as the most prominent point of the greater trochanter. Where these two lines meet, in the small depression just outside the sartorius muscle, is ST-31.
Anatomy & fascia
The point lies on the anterior aspect of the thigh, in a depression just lateral to the sartorius muscle.
Needling
The needle is inserted perpendicularly or obliquely into the thigh.
Safe depth
1–2 Cun.
Moxa, cupping & Tui Na
Moxa is well suited to this point, especially when the obstruction is due to Cold or Cold-Dampness — warming the gate to restore free flow. Tui Na massage and acupressure along the thigh can complement needling in rehabilitation work for atrophy and hemiplegia.
Functions
Activates the channel and alleviates pain. Dispels Wind and Dampness. Removes obstructions from the channel. Strengthens the leg and facilitates its movement — particularly the raising of the leg.
Indications
Atrophy (Wei Syndrome) and weakness of the lower limb. Painful Obstruction Syndrome (Bi Syndrome) of the legs. Hemiplegia and stroke sequelae. Numbness of the legs. Hip joint pain and pain in the thigh. Contraction of the thigh muscles. Cold Painful Obstruction Syndrome of the knees; inability to flex and extend the knee. Sciatica. Cold-Damp leg Qi. Lumbar pain. Jaundice.
Point combinations
With other local points along the Stomach Meridian (ST) and Gallbladder Meridian (GB) for hip and thigh pain. In atrophy (Wei Syndrome) and hemiplegia, it is combined with points along the leg to promote the raising and strengthening of the limb — an approach especially valued in multiple sclerosis and stroke rehabilitation.
Clinical spotlight
Maciocia highlights ST-31 as particularly important for facilitating the raising of the leg — a movement that is often the first to be lost in atrophy (Wei Syndrome), where the leg is dragged rather than lifted. This makes it an essential point in the treatment of multiple sclerosis (which Chinese medicine regards as a form of Wei Syndrome), post-stroke hemiplegia and other conditions of lower limb weakness. Deadman notes that the Stomach Meridian's natural abundance of Qi and Blood (Xue) makes its points especially powerful for promoting circulation in the limbs — and ST-31, sitting right at the 'gate', channels that power directly into the leg.
The golden tip
For a stiff or aching hip and thigh, or legs that feel heavy and hard to lift, find ST-31 at the front of the hip — below the bony point of the hip and in line with the crease of the groin. Press firmly with a thumb for 1–2 minutes, or warm the area gently with a heat pack. This is especially soothing when the heaviness or pain is worse in cold, damp weather.
For education only — not medical advice. Consult a qualified practitioner.