大迎 : Daying : Great Welcome or Great Meeting

Location Guides:

Classifications:

Binding point of the hand Taiyang and hand Shaoyang Sinews

Trigger point (Travell & Simons, 1998, Trigger Point Manual)

Meetings:

Meeting of Stomach with Gall Bladder Divergent and Liver Divergent

Location:

Directly anterior to the angle of the jaw, in a depression at the anterior border of the masseter muscle

Needling:

Oblique insertion 0.3 - 0.5 cun
Transverse insertion to join with such points as Dicang ST-4, Jiache ST-6, etc

Warnings:

Vigorous manipulation is contraindicated to avoid damaging the facial artery and vein

Classical Needling:

"The Yangming usually has much Qi and much Blood" (Su Wen 素問 ch. 24) implying this channel can normally be needled or bled.
"The foot Yangming is to be pierced 6 fen deep and remain inserted for ten exhalations" (Ling Shu 靈樞 ch. 12).
"It is needled to a depth of three fen, (the needle) is retained for a duration of seven exhalations, and it is moxaed with three cones" (Huangfu Mi 皇甫謐, 3rd Century, Zhenjiu Jiayi Jing 針灸甲乙經).

TCM Actions:

Eliminates Wind and reduces swelling

TCM Indications:

• Wind tetany with lockjaw, deviation of the mouth, twitching of the lips, toothache of the lower jaw, frequent yawning, stiffness of the tongue with inability to speak, inability to close the eyes accompanied by pain of the eyes.
  
• Swelling of the face and lower cheek, wind obstructing the face leading to swelling, mumps, scrofula, neck pain with chills and fever, aversion to cold.

Neuroanatomy:

Superficial Innervation: Mental nerve, branch of mandibular from trigeminal nerve (CNV3)

Dermatome Segment: Mandibular branch of trigerminal nerve (CN V3)

Trigger Point Associations:

Muscle:
Masseter

Pain Referral Pattern:
To lower jaw and molars and possibly to eyebrow

Indications:
Facial myalgia ; Toothache ; Headache ; Tempero-mandibular joint pain

Martial Applications & Effects of Injury:

This is a "big point" meaning it has abundant Qi and Blood and a strike here causes a shockwave of Yang Qi to the brain, causing dizziness in the least and most likely knock out. It also means that any point around the jaw will have this effect, hence its common depiction in movies. The direction should be straight in from the side with a hook or roundhouse strike to have the greatest effect. It also has a connection to Chenqi St-1 and Renying St-9, hence its name "Great Meeting", so a strong enough strike can affect both points causing an action on the heart and stomach via the carotid sinus and the vagus nerve at Renying St-9, and a surge of Yang Qi to the brain via Chengqi St-1 (Montaigue, Dim Mak Locations, Taijiworld.com).

Major Combinations:

• Toothache with aversion to cold:
    Daying St-5 with Quanliao SI-18, Tinghui GB-2 and Quchi LI-11
    (Sun Simiao, 孫思邈, 625: Bei Ji Qian Jin Yao Fang, 備急千金要方, Essential Prescriptions Worth A Thousand Gold).
  
  
• Pain from tooth decay:
    Daying St-5 with Sanjian LI-3 and Zhengying GB-17
    (Wang Zhizhong, 王執中, 1220: Zhen Jiu Zi Sheng Jing, 針灸資生經, Classic of Supporting Life with Acupuncture and Moxibustion).
  
  
• Toothache and tooth decay:
    Daying St-5 with Xiaguan St-7, Yifeng SJ-17 and Wangu SI-4
    (Wang Zhizhong, 王執中, 1220: Zhen Jiu Zi Sheng Jing, 針灸資生經, Classic of Supporting Life with Acupuncture and Moxibustion).
  
  
• Deviation of the mouth with inability to speak:
    Daying St-5 with Chengqi St-1, Sibai St-2, Juliao St-3, Yingxiang LI-20, Kouheliao LI-19, Shangguan GB-3, Fengchi GB-20, Quanliao SI-18, Qiangjian Du-18 and Renzhong Du-26
    (Wang Zhizhong, 王執中, 1220: Zhen Jiu Zi Sheng Jing, 針灸資生經, Classic of Supporting Life with Acupuncture and Moxibustion).

Notes:

Location of facial pulse (or slightly anterior, towards chin)Ling Shu

Ch. 21, On Cold and Heat Diseases, mentions this point and its connection with the Hand Yangming Large Intestine channel in tooth decay. Unschuld (2016) says that if there is an aversion to cold the channel is to be supplemented, if not it is to be drained. Wu & Wu (2010) say it should be drained at this point and the channel purged if the arm experiences aversion to cold.

This point would also be on the upper trajectory of the Chong mai in Jeffrey Yuen's descriptions (Yuen, 2005, The Extraordinary Vessels).

In Tibetan medicine:
Moxa point (AMNH, Tibetan Medical Paintings)

Reference Notes:

Basic information on location, needle depth, TCM actions, indications and combinations is taken from Deadman et al (2001): A Manual of Acupuncture with additional anatomical information researched by reference to Gray's Anatomy (38th Ed., 1995) unless otherwise referenced. Images were found on acupunctureschoolonline.com and can be traced back to Claudia Focks (2008) Atlas of Acupuncture originally. I cannot claim any credit or rights over them. Other sources should be quoted in the text.

For some of the more unusual terms I have created a glossary here