In Chinese medicine, it is said that yin deficiency leads to fire, so kidney fire is usually manifested by kidney yin deficiency. The symptoms of kidney fire are hot flashes, night sweats, irritable heat, restlessness, dry mouth, dry throat, red tongue and less fluid, as well as soreness of the waist and knees, spermatorrhea, premature ejaculation and impotence in men and irregular menstruation in women. Treatment should be based on nourishing Yin and tonifying the kidneys, and dietary therapy can include yam, wolfberry, mulberry and black sesame. If you have the conditions, you can also eat turtle nail soup, the effect of nourishing the yin is quite good, the medicine can eat six flavor Dihuangwan to nourish the yin and tonify the kidney, the effect is good.