Yuan-source point.

bubble_chart Etymology

"Chong" (衝) refers to the vigorous pulse of dorsal pedal artery (Fuyang pulse), indicating abundant blood and qi. "yang" (陽) refers to the high point on the dorsum of foot.

bubble_chart Location

Chongyang (ST42) acupoint
(adapted from "Meridians and Acupoints")

• Lingshu-Benshu: "In the depression five cun above instep";
• Zhenjiu Jiayi Jing: "Three cun away from Xiangu (ST43)";
• Qianjin Yaofang: "Some say two cun";
• Yizong jinjian: "Descending from Jiexi (ST41) , at the pulsating artery on the high bone of instep".

bubble_chart Anatomy

• Muscles: extensor digitorum longus tendon on the lateral side and extensor pollicis longus tendon on the medial side.
• Nerve: dorsal medial cutaneous nerve from superficial peroneal nerve, and deep peroneal nerve in the deeper layer.
• Vessels: dorsalis pedis artery, vein and dorsal pedis venous network.

bubble_chart Manipulation

Shallow needling 0.3 to 0.5 cun (moxibustion). Direct moxibustion is prohibited; moxibustion with moxa stick for 5 to 10 minutes.

bubble_chart Efficacy

Strengthen earth and resolving dampness, harmonize stomach, calm mind.

• Classical: edema of the head and face, upper tooth pain, abdominal distension, epigastralgia, foot flaccidity, swelling and pain on instep, manic and depressive psychosis, malaria, flaccidity and cold extremities, heaviness in head due to wind, forehead pain, pain along lateral thigh and calf bones, abdominal distension with loss of appetite, fever disease with no sweating, oral heat, spasm and convulsion, Bi syndrome and numbness, chills with intermittent fever, inability to lift limbs, abdominal fullness and heaviness of body, frequent vomiting, goiter, crooked eyes and mouth.
• Modern: vasculitis.

bubble_chart Combinations

• Foot flaccidity with inability to wear shoes: Chongyang (ST42), Zusanli (ST36), Pucan (BL61), Feiyang (BL58), Fuliu (KI7), Wangu (GB12).
• Malaria starting from lower legs: Chongyang (ST42), Shugu (BL65).
• Manic behavior, climbing high and singing, or running away naked: Chongyang (ST42), Fenglong (ST40).
• Beriberi: Gongsun (SP4), Chongyang (ST42), Sanli.