Deficiency of liver and kidney function mainly refers to yin deficiency of liver and kidney. That is to say, there is insufficient blood. This will lead to dizziness, (because the brain stores bone marrow, which is transformed from kidney essence, and blood is the material basis of mental activity, so deficiency of liver and kidney will lead to brain malnutrition and dizziness). Dry eyes (because both liver blood and kidney essence have eye-pleasing functions, I am afraid that my eyes will get blood, and only with the nourishment of liver blood and kidney essence can I see everything in the world clearly). It may also be hand shaking (because liver blood and kidney essence have nourishing and moistening effects on joints). It is also possible to have a stroke (because of yin deficiency of liver and kidney, yang can't be controlled, and excessive yang is prone to cerebrovascular accidents) and so on.