Zhao, to shine; hai, sea.
The point pertains to the Kidney Meridian and the Qi is abundant as the sea. It means that the real Yang of the kidney may illuminate the whole body.
1 cun directly below the tip of the medial malleolus.
Irregular menstruation, leukorrhea, hysteroptosis, urinary retention, urinary tract infection, epilepsy, pharyngitis, insomnia.
Perpendicularly 0.3-0.5 cun.