Cuan means to gather; bamboo means eyebrows. The eyebrows are cave-dwelling. When you frown, the eyebrows are clustered here, shaped like a collection of thin bamboos, hence the name. Also known as "eyebrow" (Suwen‧Qixue Lun), "eyebrow" (Suwen‧Gukong Lun), "member column" (Waitai Miyao , Zhenjiu Jiayi Jing (mistaken as "member") are all related to the eyebrows and their location. Also known as Shiguang, Yeguang and Mingguang (Zhenjiu Jiayi Jing; Bronze Figure acupoint acupuncture and moxibustion Picture Book mistakenly read as "Guangming (GB37)") because of its improving Vision is named after its function.

[Location]

Zanzhu (BL2) acupoint
(quoted from "Meridians and Acupoints")

• Zhenjiu Jiayi Jing: "Among those with sunken brows";
• Xunjing Kaoxue Bian: "The inner canthus goes straight up to the middle of the brow." ;
• Donggong Anmo Mijue: "In the sharp corner of the eyebrow."

[Anatomy]

• Muscles: frontalis, corrugator supercilii.
• Nerve: medial branch of the frontal nerve of the trigeminal nerve.
• Vessels: frontal artery and vein.

[Manipulation]

Transverse insertion of 0.5 to 1 inch toward the middle of the eyebrow or in the direction of Jingming (BL1); or puncture for bleeding; or tapping with a dermal needle. Moxibustion is prohibited.

[Efficacy]

dispelling wind, venting heat, improving vision.

• Classical: head wind, headache, supraorbital ridge pain, sweating Hanre, wind-cold, wind dizziness, red face and cheek pain, eyelid, dizziness, nebula, Red and swollen eyes, pterygium, tears in the wind, heat tearing, frequent discharge, blurred vision, difficulty in vision, eyes that are about to fall off, allergic rhinitis, epilepsy, upset, inability to lie down, madness, fright epilepsy in children, scabies, strong nape, hemorrhoids .
• Modern: forehead pain, myotonic headache, conjunctivitis, angular membranenitis, dacryocystitis, myopia, optic neuritis, optic atrophy, facial palsy, vitreous opacity, photomyopia, eyelid ptosis, stye, insomnia, stuffy nose , Anal postoperative pain.

[Recipe]

• Wind header: Zanzhu (BL2), Chengguang (BL6), Shenshu (BL23), Sizhukong ( TE23), and Liao.
• Red face and mid-cheek pain: Zanzhu (BL2), Yinjiao (GV28), Yuzhen (BL9).
• Brow pain: Zanzhu (BL2), Touwei (ST8).
• Momo in the title: Zanzhu (BL2), Sanjian (LI3).
• Red Yi: Zanzhu (BL2), Houxi (SI3), Yemen (TE2).
• Trigeminal neuralgia (first branch): Zanzhu (BL2), Qucha (BL4), Yangbai (GB14), Yifeng (TE17), Xiaguan (ST7), Sizhukong (TE23).
• Shame: Zanzhu (BL2), Jingming (BL1), Taiyang (EX-HN5), Hegu (LI4) , Erjian (LI2), Guangming (GB37), Taixi (KI3).
• Forehead pain: Zanzhu (BL2) through Yuyao (EX-HN4), Fengchi (GB20), Hegu ( LI4 ).

[Notes]

According to Wang Bing's note, the "brow" and "meiben" mentioned by Suwen are "Zanzhu (BL2)".