What are the contraindications of "nourishing yin and strengthening water to make sunshine" and "bitter cold and direct diarrhea and strengthening fire"? What kind of fever is it suitable for? Why is it not suitable for qi stagnation and fever? Let me give my opinion. If qi is depressed, the Lord of strengthening water can achieve the effect of fire control by replenishing water, not directly purging fire, but the yin-nourishing medicine is too greasy, which is already depressed. If you get bored again, the depression will get worse, and the qi can't get up without water, so nourishing yin can't achieve the effect of reducing fire, but it will accumulate evil. The straight folding of bitter and cold means that the main herbs in this prescription are bitter and cold, and there are very few other herbs. It is easy to understand that bitter cold hurts yin, yin and blood are homologous, yin deficiency easily leads to blood deficiency, blood deficiency plus cold coagulation leads to blood stasis, and blood stasis leads to qi stagnation. This was not cured, but the fire was just reduced there. As soon as the medicine stopped, the fire came up again. This was a vicious circle, and the yang was injured by cold, and the vaginal fluid was bitter and dry, which became empty for a long time. Therefore, the most fundamental thing is to regulate qi, add a little bitter and cold medicine, or it is more appropriate to be pungent and cool, and it is the principle of "fire stagnation" without losing coolness. This is my personal understanding and is for reference only.