0.5–1 cun obliquely towards the spine.
Or 1 to 1.5 cun transversely towards the spine. This method applied more often as it allows the patients to lie in a supine position easily during needling retention.
As the Back Transporting-Shu point of the Stomach, Weishu BL-21 is an important point with various functions related to the Stomach.
First of all, it strongly tonifies the Stomach Qi. Thus it can ease poor appetite, fatigue, weak limbs and thin body without strength. It often used together with Pishu BL-20 to tonifies the Spleen and the Stomach. Both Organs are the Root of the Post-Heaven Qi, Blood and Food Essences. The combination of these two points helps patient who suffer from long-term physical and mental exhaustion or simply low in energy.
Secondly, with Reducing Needling method, it also regulates Stomach Qi and subdues Rebellious Qi, characterized by symptoms such as belching, hiccup, nausea and vomiting. It also relieves food retention in the Stomach, causing epigastric fullness or sour regurgitation.