0.5–1 cun strictly vertically in an inferior direction.
Caution: Injury to the cervical marrow.
Yamen is translated to 'Gate to Muteness' in Chinese, which indicates its relationship with speech ability. Indeed, it is mostly used to stimulate speaking for children with speech difficulties or for adults after a Wind-stroke.
Secondly it is used to expel Interior Wind so as to regain consciousness from Wind-stroke and epilepsy.
With Tonifying method, it also rises clear Yang to the head so as to nourish the Brain and clear the Mind. It is because Yamen DU-15 works as the Sea of Qi point. Thus it treats feeling of heaviness of the head, poor memory and poor concentration.