Vertically 0.5–1 cun.
Caution: Peritoneum, urinary bladder, pregnancy
Shuidao ST-28 is a very important point for the Lower Burner disorders.
As its name 'Water Passages' indicates, it is a major point to promote Body Fluids transformation, transportation and excretion. Typical manifestations include Oedema as well as urinary difficulty or retention, especially in Excess patterns.
Two other points have similar function of harmonizing Body Fluids. Their names also contain 'Shui (Water)': Renzhong DU-26 (also called 'Shuigou) for the Upper Burner and Shuifen REN-9 for the Middle Burner.