The exact location of the Rangu point is below the rough ridge of the navicular bone of the foot, at the red-white meatus (the junction of the heart of the hand and the back of the hand, and the heart of the foot and the back of the foot). Rangu belongs to the Kidney meridian of the foot and is located on the inner side of the foot, below the rough ridge of the foot navicular bone, at the point of the red-white flesh margin. Rangu point has the effect of nourishing the kidneys and benefiting the essence, and also has the effect of facilitating the lower jiao, in addition to clearing and diarrhea of deficiency heat. Rangu is the main treatment for irregular menstruation, yin ting (prolapse of the uterus or even out of the vaginal opening), yin itching, leucorrhea (cloudy urine like white pulp), as well as silence, diarrhea and other diseases. Rangu acupoint can be combined with Ququan acupoint, Taichong acupoint and Yongquan acupoint to treat yin erectile dysfunction; with Yingu acupoint, Yinjiao acupoint and Taichong acupoint to treat impotence; and with Kidney acupoint, Taixi acupoint and Sanyinjiao acupoint to treat irregular menstruation. Rangu acupoint can also be used with Zhongji acupoint, Dahe acupoint and Taichong acupoint to treat spermatorrhea. If you need to use acupuncture points to treat diseases, you need to be operated by a doctor, do not operate on your own to avoid adverse consequences.