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Chinese Name: Fengchi (风池)
Meridian: Gallbladder (Shaoyang)
Location: Below the occipital bone, in the depression between sternocleidomastoid and trapezius
Moxa Duration: 3-5 min | Distance: 2-3 cm
Evidence Level: Moderate
Related: Moxibustion for Insomnia: Acupoint Protocol for Better Sleep
GB20 is located in the hollow at the base of the skull, between the origins of the sternocleidomastoid and trapezius muscles, approximately level with GV16 (Fengfu).
A 2019 systematic review found GB20 was the most frequently used acupoint in headache trials, appearing in 82% of moxibustion protocols for tension headaches. Combined moxibustion at GB20 and GB21 reduced monthly headache days from 8.5 to 3.1 in a 12-week observational study.