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For facial paralysis (facial deviation) not caused by external wind pathogens, there is a differentiation between Cold patterns and Heat patterns. The *Neijing* states: "The sinews of the Foot-Yangming channel draw from the clavicle to the cheek; sudden deviation of the mouth occurs, and on the tight side, the eye cannot close." If it is a Heat pattern, the sinews become flaccid and relaxed, and the eye cannot open. If the sinews of the cheek are affected by Cold, they contract and pull the mouth to one side; if affected by Heat, the sinews become lax and relaxed, unable to maintain tension, thus causing deviation. This passage in the classic text discusses the slackness or tension of sinews based on the Cold or Heat nature of the disease. However, if Blood and Qi are not deficient, even Heat may not necessarily cause relaxation, and even Cold may not necessarily cause tension; this ultimately points to the decline of Blood and Qi. I have seen some cite the meaning of the *Neijing* to say: for left-sided deviation, it is due to Cold on the left and Heat on the right; for right-sided deviation, it is due to Cold on the right and Heat on the left. This is indeed an erroneous statement. One fails to realize that in left-sided deviation, the tension is on the left, while the right is originally unaffected; the same applies to right-sided deviation. Therefore, regardless of left or right, any area of tension is where Blood and Qi are deficient. When treating with herbs, both sides should generally be treated with tonification. When treating with Moxibustion (Ai Jiu), one should apply moxa directly to the site of tension. Since the channels are deficient, one must rely on the warmth of moxa fire to promote the movement of Qi; when Qi moves, Blood moves, so the sinews can relax and the deviation can be corrected. Regarding various moxibustion methods, some advocate treating the left side by stimulating the right, and vice versa. This is also the method described in the *Miao Ci Lun* chapter of the *Neijing*, and following it is acceptable. As for the Cold and Heat manifestations mentioned in the classics, such as loose lips with drooling, heavy voice, and slow or slurred speech, these are all types of flaccidity/relaxation. Flaccidity is mostly caused by Heat, but occasionally by Cold, due to Qi deficiency. Deviation, pulling, spasms, and opisthotonos are all types of tension/spasm. Tension is mostly caused by Cold, but occasionally by Heat, due to Blood deficiency. What the classics state refers to the general principles, while what I state refers to the variations in disease, both of which conform to medical logic. If one studies the classics without understanding the underlying logic, one will inevitably distort their original meaning. Therefore, when encountering such conditions, careful examination is indispensable.

1. Convulsions and other syndromes associated with Non-Wind (Fei Feng) also require differentiation between Cold and Heat. Observing the classics, it says: "Cold causes the body to arch backward and sinews to tighten; Heat causes sinews to relax and fail to hold." This is indeed the norm. However, both Cold and Heat can cause tension, and both can cause relaxation; this point must also be understood. For instance, tension caused by Cold arises because excessive Cold coagulates Blood; coagulated Blood leads to stagnation and sluggishness; sluggishness leads to tension. This indicates that Cold has damaged the Ying (Nutritive) level. Tension caused by Heat arises because excessive Fire dries out Blood; dried Blood leads to withered sinews; withered sinews lead to tension. This indicates that Heat has damaged the Ying (Nutritive) level. Furthermore, relaxation caused by Cold arises because excessive Cold leads to Qi deficiency; deficient Qi fails to secure and control; failure to secure leads to relaxation. This indicates that Cold has damaged the Wei (Defensive) level. Relaxation caused by Heat arises because excessive Heat makes sinews soft; soft sinews fail to hold; failure to hold leads to relaxation. This indicates that Heat has damaged the Wei (Defensive) level. By using this method of differentiation, is it not clear? Moreover, whether it is a Cold or Heat pattern, there must be pulse signs and symptoms as evidence; treatment should simply follow the syndrome. If the disease presents no obvious Cold or Heat characteristics, then one should exclusively treat the deficiency of Blood and Qi without doubt.