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.
Pishu BL-20 is one of the most important Back Transporting-Shu points with various functions.
First of all, it strongly tonifies the Spleen Qi and Yang. The typical symptoms of Spleen Qi Deficiency are tiredness, loose stools, no appetite and abdominal distension. When combined with Weishu BL-21, it tonifies the Stomach Qi as well. Both Organs are the Root of the Post-Heaven Qi, Blood and Food Essences. They are often used together for patient who suffers from long-term physical and mental exhaustion or simply low in energy.
Furthermore, stronger Spleen function prevents Qi Sinking or Collapsing, while stronger Spleen Qi is able to hold Blood in the vessels and stop bleeding. Combined with Shenshu BL-23, BL-23 treats some symptoms such as heavy menstruation, Blood in stools or urine, Uterus or Stomach prolapse or feeling of bearing-down in the lower abdomen.
Pishu BL-21 nourishes Blood as well, because the the Spleen contributes to the Blood creation. For this purpose, it is often combined together with Shenshu BL-23 and applies direct moxibustion.