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【Location】On the face，on the medial extremity of the eyebrow.
【Manipulation Method】Puncture obliquely downward 0.3-0.5 cun for the problems of the eyes，puncture subcutaneously through Yuyao（EX-HN 4）.
【Indications】Pain and swelling in the eyes，blurred vision，lacrimation with wind，twitching of eyelids，ptosis of the eyelids，headache，pain in the supraorbital bone，facial pain，deviated mouth and eye，hiccup，lumbago.
【Stratified anatomy】（Fig.I-7）
（1）Skin The skin is distributed by supratrochlear n..
（2）Subcutaneous tissue There are branches of supratrochlear n.，branches or tributaries of supratrochlear a. ＆ v..
（3）Orbicularis oculi The orbicularis oculi is located in the deep surface of superficial fascia around the rima oculi.
Fig.1-7 Stratified anatomy of Cuanzhu（BL 2）（left side，middle layer）
（4）Corrugator supercilii The corrugator supercilii is located in the deep surface of pars orbitalis muscle and frontal belly of occipitofrontalis，between two sides of the superciliary arch.
The deep surface of the acupoint is frontal bone.
【Cautions】It is possible to stab the angular a. ＆ v.if puncturing obliquely downward.It may cause local hematoma if serious damage occurrs.It is possible to stab the supraorbital a. ＆ v.and so on in case laterally pierce “Yuyao”.It may cause local hematoma if serious damage occurrs.It is advisable to take skin-pinching up needle inserting，puncturing into the skin quickly，and then insert the needle slowly.It’s indicated that the needle tip has touched the blood vessel when the patient let out cry of pain.It is recommended to slightly draw back the needle，change the direction of acupuncture，and then pierce again.If the desired sensation is not obvious，it is not advisable to take lifting and thrusting，and twirling.The needle should be retained to bring about the desired sensation.The needle is generally not moved during retention.It can only make a slight twist，but not lifting and thrusting while the need for treatment.While removing the needle，there shall be with a gentle manner and half minute’s pressing of cotton ball for avoiding bleeding.