0.5–1 cun vertically or 1–1.5 cun obliquely in a proximal direction.
Ximen P-4 is mostly used in acute conditions and is very effective in opening the chest and remove Heart Blood Stagnation so as to stop pain. As the Accumulation-Xi point, it is particularly useful in removing the Obstruction in Pericardium Channel. Therefore, it can ease chest and Heart pain.
It is also useful in calming the Heart and regulating its rhythm. Thus it is often used to treat arrhythmia and palpitations. It calm the Mind as well. The typical symptoms are agitation, anxiety, insomnia, mental restlessness, depression and fright.