Text 1合谷穴。穴位在手背第2掌骨桡侧的中点处。治疗作用：①头痛、目赤肿痛、齿痛、鼻衄、口眼歪斜、耳聋等头面五官病证；②发热恶寒等外感病证；③热病无汗或多汗；④痛经、经闭、滞产等妇产科病证；⑤各种痛证为牙拔除术、甲状腺手术等五官及颈部手术针麻常用穴。操作是直刺05~1寸针刺时手呈半握拳状。孕妇不宜针。Please translate the Text 1 from Chinese into English

Text 1: Hegu acupoint. The acupoint is located in the middle of the second metacarpal bone on the radial side of the back of the hand. It has the following therapeutic effects: ① for head, face and five sense organs diseases such as headache, red and swollen eyes, toothache, nosebleeds, facial paralysis, and deafness; ② for external diseases such as fever and chills; ③ for heat diseases with or without sweating; ④ for gynecological diseases such as dysmenorrhea, amenorrhea, and dystocia; ⑤ for various pain diseases, commonly used for acupuncture anesthesia during dental extraction, thyroidectomy and other surgeries on the face and neck. The operation is to directly puncture 0.5-1 inch. When needling, the hand should be in a half-fist position. Pregnant women should not be needled.