Acupuncture Points and Needling Techniques: Location, Depth, and Methodology

Acupuncture points (acupoints) are specific anatomical locations on 14 main meridians (12 regular + 8 extraordinary) and extra points. WHO standardized 361 classical points; modern practice uses 400+.

Point Location

• Anatomical landmarks: bones, tendons, muscles, creases, arterial pulses.
• Proportional measurement: cun (body inch) — 1 cun = width of thumb at crease; 3 cun = four fingers breadth at metacarpophalangeal joints; patient's own hand.
• Electrical conductance: lower impedance at points (controversial/device-dependent).

Needle Insertion Techniques

Method	Description	Indication
Perpendicular (90°)	Straight insertion to prescribed depth	Fleshy areas; strong stimulation
Oblique (15–45°)	Angled along meridian or transverse	Thin areas (neck, face, extremities); avoid deep structures
Transverse/Subcutaneous	Parallel to skin, minimal depth	Face, scalp, hand/wrist; cutaneous stimulation
Puncture (insert-withdraw)	Rapid in-out; minimal retention	Acute pain, excess conditions; strong stimulation
Retention (15–30 min)	Needles left in place; manual/electro stimulation	Most chronic conditions; tonification/sedation
Tapping/Percussion	Needle handle tapped with finger/mallet	Facial, scalp; enhances sensory input

Depth Guidelines

• Face/scalp: 0.1–0.3 cun (subcutaneous)
• Trunk/limbs: 0.5–1.5 cun (muscle layer)
• Thick gluteal: up to 2–3 cun
• Contraindicated depths: over organs, vessels, nerves, spine (without advanced training)

De Qi (得气)

Sensation of soreness, numbness, distension, heaviness, or radiating electric feeling—indicates therapeutic needle engagement. Not pain.

Mastery requires years of supervised clinical training. Never self-needle.