陈飞霞曰∶小儿热症有七∶面腮红，大便秘，小便黄，渴不止，上气急，足心热，眼红赤。此皆实热证，忌用
温补剂。
小儿寒症有七∶面 白，粪青白，肚虚胀，眼珠青，吐泻无热，足胫冷，睡露睛，此皆虚寒症，忌用寒凉剂。
涂蔚生曰∶飞霞此节，虽为寒热症之辨法，然必须有二者以上之兼症，方可断为或寒或热也。如仅有面腮红，而
不见有便黄便秘等症，则恐是伤寒发热之候，本寒而标热也。如仅有眼珠青而不见有粪青白睡露睛等症，则恐是肝
热将炽之候，本热而标寒也。此等精微，何可弗辨。
涂蔚生曰∶舌虽为心之苗，而脏腑寒热之气无不荟萃于一舌。故即一舌之或黄或白或黑或赤，而可断其为或寒
或热或虚或实也。舌本属肾，舌尖属心，两旁属肝胆，中央属脾胃。病在表，舌无苔，入里则苔结矣。苔黄者里有
热也，黄而干枯无津液者，热甚也，苔黑而舌燥裂无津液者，热至极也。若黑而油润有津液者，此又为寒极似热，忌
用寒凉。若舌尖红赤，而又有小粒子者，此是心热，可用清凉。若舌黄赤而舌尖灰白者，此为下热上寒，反之则为下
寒上热。若满色白腻，而有津液者，此为虚寒
阴凝，可用温补。然苔白而有寒热往来，口苦咽干者，又系少阳热结，可用清解。医者苟于审症不明，可用此法，
以诊寒热。至于小儿无识，不易开口，可在唇下承浆穴掐之，使其哭以张口也。
陈飞霞说：小儿的热证有七种表现：面颊和腮部发红，大便干结不通，小便颜色黄，口渴不止，呼吸急促气逆，脚心发热，眼睛红赤。这些都属于实热证，忌讳使用温补类药物。
小儿的寒证也有七种表现：面色苍白，粪便呈青白色，腹部虚胀，眼珠呈现青色，呕吐腹泻且无发热，小腿发冷，睡觉时眼睛半睁（露睛）。这些都属于虚寒证，忌讳使用寒凉类药物。
涂蔚生说：陈飞霞这一节内容，虽然是辨别寒热证的方法，但必须同时具备两种以上的兼症，才能断定是寒证还是热证。例如，如果仅有面颊腮部发红，而不见有小便黄、大便干结等症状，则恐怕是伤寒发热初期的征候，本质为寒而表象为热。如果仅有眼珠青色，而不见有粪便青白、睡觉露睛等症状，则恐怕是肝热即将炽盛的征候，本质为热而表象为寒。这种细微之处，怎么可以不加以辨别呢？
涂蔚生又说：舌虽然被认为是心的外候（苗窍），但脏腑的寒热之气无不汇聚于舌上。因此，通过观察舌头颜色的或黄、或白、或黑、或赤，就可以判断其属于寒、热、虚、实中的哪一种。舌根属肾，舌尖属心，舌两侧属肝胆，舌中部属脾胃。病邪在表时，舌头上没有苔；病邪入里后，舌苔就会凝结。舌苔发黄，说明里有热；苔黄且干枯无津液，说明热势严重；舌苔黑且舌面干燥裂开无津液，说明热极。如果舌苔黑但油润有津液，这又是寒极似热的表现，忌讳使用寒凉药物。如果舌尖红赤，并且上面有小颗粒（芒刺），这是心热的表现，可以使用清凉药物治疗。如果舌苔黄赤而舌尖灰白，这是下焦热而上焦寒的表现，反之则是下焦寒而上焦热。如果满舌色白腻且有津液，这是虚寒阴凝的表现，可以使用温补药物治疗。然而，如果舌苔白，伴有寒热往来、口苦咽干的症状，这又属于少阳热结，可以使用清解法治疗。医生如果在辨证时不明晰，可以运用这种方法来诊断寒热。至于小儿不懂事，不容易开口，可以在唇下的承浆穴进行掐按，使其哭泣从而张开嘴巴以便观察。
Chen Feixia stated: There are seven manifestations of heat syndromes in children: redness of the cheeks and malar region, constipation, yellow urine, unquenchable thirst, rapid breathing with qi rebellion, heat in the soles of the feet, and red eyes. These all belong to excess-heat syndromes (Excess-Heat Syndrome), and warm-tonifying agents should be contraindicated.
There are also seven manifestations of cold syndromes in children: pale complexion, greenish-white stool, abdominal distension due to deficiency, bluish eyeballs, vomiting and diarrhea without fever, cold lower legs, and sleeping with eyes partially open (Sleeping with Eyes Open). These all belong to deficiency-cold syndromes (Deficiency-Cold Syndrome), and cold-cooling agents should be contraindicated.
Tu Weisheng stated: Although this section by Feixia is a method for distinguishing between cold and heat syndromes, two or more accompanying symptoms must be present simultaneously before one can diagnose either cold or heat. For instance, if there is only redness of the cheeks and malar region, without seeing symptoms such as yellow urine and constipation, it may be a sign of fever from Cold Damage (Shanghan) where the root is cold but the branch is heat. If there is only bluish eyeballs, without seeing symptoms such as greenish-white stool and sleeping with eyes open, it may be a sign that Liver Heat (Liver Fire) is about to blaze, where the root is heat but the branch is cold. Such subtleties must not be ignored.
Tu Weisheng further stated: Although the tongue is considered the sprout of the Heart, the qi of cold and heat from all zang-fu organs gathers upon the tongue. Therefore, by observing whether the tongue is yellow, white, black, or red, one can determine whether the condition is cold, heat, deficiency, or excess. The root of the tongue belongs to the Kidney, the tip to the Heart, the sides to the Liver and Gallbladder, and the center to the Spleen and Stomach. When pathogenic factors are at the exterior, there is no coating on the tongue; when they enter the interior, a coating forms. A yellow coating indicates interior heat; a yellow coating that is dry and lacks fluids indicates severe heat; a black coating with a dry, cracked tongue lacking fluids indicates extreme heat. However, if the coating is black yet oily and moist with fluids, this indicates extreme cold mimicking heat, and cold-cooling agents are contraindicated. If the tongue tip is red and赤 (red) with small papillae (prickles), this indicates Heart Heat, and cooling agents can be used. If the tongue body is yellow-red while the tip is grayish-white, this indicates heat below and cold above; conversely, it indicates cold below and heat above. If the entire tongue is white, greasy, and has fluids, this indicates deficiency-cold with yin condensation, and warm-tonifying agents can be used. Nevertheless, if the coating is white accompanied by alternating chills and fever, bitter taste in the mouth, and dry throat, this belongs to Shaoyang Heat Knot (Shaoyang Syndrome), and clearing and resolving methods can be used. If physicians are unclear in their symptom differentiation, they may use this method to diagnose cold and heat. As for children who do not understand and find it difficult to open their mouths, one can pinch the Chengjiang acupoint (Chengjiang, CV24) below the lip to induce crying and thus open the mouth.