Feature：
Ying-Spring and Water point of the Gall Bladder channel
穴位特点：五腧穴之荥穴（五行属水）
Location:
Between the fourth toe and the little toe, 0.5 cun proximal to the margin of the web.
The Location of Xia Xi GB-43 from A Manual of Acupuncture by Deadman
Needling:
Perpendicular insertion 0.3 to 0.5 cun; oblique insertion directed proximally 0.5 to 1 cun.
Actions:
1. Clears heat and benefits the head, ears and eyes (清热，利头，眼，耳)
2. Clears damp-heat from the channel and reduces swelling (清经络之湿热，消肿)
Indications:
1. Headache, dizziness, visual dizziness, hypertension, redness and pain of the outer canthus, itching of the eyes, deafness, tinnitus, pain of the ears, pain and swelling of the cheek and submandibular region.
头痛，眩晕，目眩，高血压，目外眦赤痛，目痒，耳聋，耳鸣，耳痛，脸颊与下颌肿痛。
2. Fullness and pain of the chest and lateral costal region, pain of the chest with inability to turn to the side, breast abscess, discharging breast abscess.
胸胁满痛，胸痛无以转侧，乳痈，乳痈出脓。
3. Amenorrhoea, hardness and pain of the hypogastrium, swelling of the four limbs, pain of the whole body, febrile disease with absence of sweating, copious sweating, malaria, mania.
闭经，少腹硬痛，四肢肿，全身痛，热证汗出过多，多汗，疟疾，狂躁。
4. Wandering pain, pain of the knee and thigh, swelling and pain of the lateral aspect of the knee, redness, swelling and pain of the dorsum of the foot, heat in the soles of the feet, damp erosion and cracks between the toes, contraction of the five toes.
游走疼痛，膝与大腿痛，膝外侧肿痛，足背红肿痛，足底热，脚趾间湿腐与干裂，五个脚趾拘挛。
辨析：
《难经》指出五腧穴之“荥主身热”。此穴在现代多用于头痛，但是在古典医集中未曾记载。
胆腑和胆经都很容易被湿热侵袭。很有意思的是，靠近膝盖部位的穴位（比如合穴）多用来治腑证，而远端穴（比如井和荥）多用来治疗经证。
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