Chengshan (BL57): The Key Point for Leg Cramps and Lower Back Pain
Learn about Chengshan (承山 BL57), a powerful Bladder Meridian acupoint used for leg cramps, lower back pain, hemorrhoids, and muscle stiffness. Includes location, functions, and self-care techniques.
Introduction to Chengshan
Chengshan (承山 BL57), meaning “Supporting Mountain,” is one of the most important acupoints on the Bladder Meridian of Foot-Taiyang. Located on the calf, it is the go-to point for leg cramps, lower back pain, and hemorrhoids — three remarkably common complaints.
The name “Supporting Mountain” is vivid: when you stand on tiptoe, the gastrocnemius muscle belly rises like a mountain, and the point sits right at the peak of that muscular “mountain,” supporting the body’s weight and movement.
| Attribute | Detail |
|---|---|
| Meridian | Bladder Meridian of Foot-Taiyang (足太阳膀胱经) |
| Point type | Key point of the Bladder Meridian |
| Command region | Lower back, legs, anus |
Location
Chengshan is located on the posterior aspect of the lower leg:
- Standard location: On the posterior midline of the calf, in the depression between the two bellies of the gastrocnemius muscle, approximately at the midpoint between the popliteal crease (back of the knee) and the heel
- Easy method: Stand on tiptoe — the point is at the highest point of the calf muscle bulge, in the V-shaped depression between the two muscle heads
Pro tip: Press firmly — most people will feel a strong ache or even a radiating sensation down to the foot. This tenderness confirms the correct location.
Key Functions
1. Relax Muscles and Stop Cramps
Chengshan is the single most important acupoint for calf muscle cramps (charley horses). It directly relaxes the gastrocnemius and soleus muscles, making it invaluable for:
- Nocturnal leg cramps
- Exercise-induced calf spasms
- Calf stiffness and tightness
2. Relieve Lower Back Pain
Through the Bladder Meridian’s pathway along the back, Chengshan treats:
- Acute lower back sprain and strain
- Chronic lumbar pain
- Sciatica radiating down the leg
- Stiffness and limited range of motion in the lower back
3. Treat Hemorrhoids
Chengshan is one of the most effective points for hemorrhoids in TCM. The Bladder Meridian’s connection to the pelvic region and its role in moving Qi and Blood in the lower body makes it a first-line choice for:
- Painful, swollen hemorrhoids
- Bleeding hemorrhoids
- Anal fissure discomfort
4. Promote Circulation in the Lower Limbs
Chengshan moves Qi and Blood through the legs, helping with:
- Heavy, tired legs
- Swelling in the lower limbs
- Poor circulation in the feet
Clinical Applications
Leg Cramps (Nocturnal and Exercise-Related)
For sudden calf cramps:
- Acupressure: Press firmly on Chengshan on the affected leg for 2–3 minutes
- Combined with: Kunlun (BL60) and Weizhong (BL40) for comprehensive relief
- Prevention: Daily acupressure before bed can reduce frequency of nighttime cramps
Lower Back Pain
Chengshan is especially effective for acute lower back strain:
- Acute sprain: Press Chengshan firmly while gently moving the lower back
- Chronic pain: Combine with Shenshu (BL23) and Weizhong (BL40)
- The ancient saying: “腰背委中求，承山亦可收” — for lower back pain, look to Weizhong, and Chengshan can also help
Hemorrhoids
Chengshan is used alongside other points:
- Mild hemorrhoids: Daily acupressure on Chengshan + Erbai (EX-UE2)
- Swollen hemorrhoids: Combined with Changqiang (GV1) and Huiyang (BL35)
- Bleeding hemorrhoids: Add Ciliao (BL32) for stronger pelvic circulation
Plantar Fasciitis and Heel Pain
Through its position on the Bladder Meridian, Chengshan helps:
- Morning heel pain
- Plantar fasciitis
- Achilles tendon tightness
Acupressure Self-Care
Technique
- Position: Sit with the ankle resting on the opposite knee, or sit on the floor with legs extended
- Locate: Find the V-shaped depression in the middle of the calf muscle
- Press: Use both thumbs to press firmly into the point
- Motion: Apply steady pressure with small circular motions
- Duration: 2–3 minutes per leg
- Intensity: A strong dull ache is normal — the point is usually quite tender
Recommended Routines
| Condition | Pressure Time | Frequency |
|---|---|---|
| Leg cramp (acute) | 3–5 minutes on affected leg | As needed |
| Lower back pain | 2 minutes per leg | 2–3 times daily |
| Hemorrhoid prevention | 2 minutes per leg | Daily |
| Tired legs | 1–2 minutes per leg | After long standing |
Moxibustion on Chengshan
Moxibustion is particularly effective for:
- Cold-type leg cramps (cramps worsened by cold)
- Chronic lower back pain with cold sensation
- Hemorrhoids that worsen in cold weather
Apply mild moxa for 10–15 minutes per point. The warmth penetrates deeply into the calf muscle and can be very soothing.
Key Combinations
| Combination | Purpose |
|---|---|
| Chengshan + Weizhong (BL40) | Lower back and leg pain |
| Chengshan + Kunlun (BL60) | Heel and calf issues |
| Chengshan + Yanglingquan (GB34) | Muscle spasms and cramps |
| Chengshan + Sanyinjiao (SP6) | Leg swelling and fatigue |
Precautions
| Situation | Guidance |
|---|---|
| Pregnancy | Use with caution — consult a practitioner |
| Deep vein thrombosis | Do not apply strong pressure on the calf; seek immediate medical attention |
| Varicose veins | Use gentle pressure only; avoid direct pressure on visible veins |
| Achilles tendon injury | Use caution with positioning and pressure |
Key Takeaways
- Chengshan (BL57) is the premier point for leg cramps — press it the next time a charley horse strikes
- It powerfully relieves lower back pain through the Bladder Meridian pathway
- One of the most effective acupoints for hemorrhoids
- Easy to locate and ideal for self-acupressure
- Avoid strong pressure if you have DVT or severe varicose veins
Disclaimer: This article is for educational purposes only. Acupuncture should be performed by a licensed practitioner. If you experience sudden calf swelling or pain, seek immediate medical attention to rule out deep vein thrombosis.
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FAQ
Who is this article for?
This article is for readers who want a practical, beginner-friendly understanding of this TCM topic.
Can this article replace professional medical advice?
No. This content is educational only and should not replace diagnosis or treatment from a qualified healthcare professional.
Disclaimer
This content is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional for diagnosis and treatment.