人皆谓夹证与兼证难治，丰独曰无难也。曷为夹证？譬如受风便是伤风，宜桂枝汤之属；受寒便是
伤寒，宜麻黄汤之属；倘风寒两伤者，即为夹证也。盖风宜散，寒宜温，温散之方，宜桂麻各半汤之属。
倘或暑邪夹湿，湿宜利，暑宜清，清利之方，宜天水散之属。倘或燥气夹火，火宜凉，燥宜润，凉润之方，宜
清燥救肺汤之属。其余风暑、风湿、风燥、风火，皆系夹证，其治法皆可仿此。至于兼证奈何？假如少壮
遗精，当分梦之有无，有者宜坎离既济汤之类，无者金锁固精丸之类，此定法也。或被湿热所触者，便为兼
证，利湿必伤其阴，补阴必滞其湿，思利湿而不伤阴者，如猪苓汤、六味丸之类；若湿邪甚者，又当先治
其湿，湿邪一化，再涩其精可也。又如老年虚损，当分证之浅深，浅者宜六君、四物之类，深者宜固本、大
造之类，此定法也。倘被风邪所客者，便为兼证，散风益虚其正，补正必关其邪，思散邪而不损正者，如参
苏饮、补中益气之类；若风邪甚者，又当先散其风，风邪一解，再补其损可也。又如女子经事当行，必
审其或先或后，先则为血热，宜丹栀四物之流；后则为血寒，宜香砂四物之流，此为定法。或被寒邪所触者，
即兼证也，考诸方能散寒且能调经，如香苏饮之流，若过盛者，必须先散其寒，再调其经则可矣。又如妇人
产后发热，必辨其属虚属实，虚则宜补益，如加味四物之流；实则宜破瘀，如生化、失笑之流，此
为定法。设被暑邪所感者，即兼证也，考诸方能清暑且治产后，如竹皮大丸之流，若过盛者，必须先清
其暑，再治产后则可矣。医者能于如此圆变，则治夹证兼证，何难之有！
人们都说夹证与兼证难以治疗，我雷丰却认为并不困难。什么是夹证？比如感受风邪就是伤风，适宜用桂枝汤这类方剂；感受寒邪就是伤寒，适宜用麻黄汤这类方剂；如果风寒同时受伤，就称为夹证。因为风邪宜用发散法，寒邪宜用温散法，所以温散之方的代表是桂枝麻黄各半汤这类。如果是暑邪夹带湿邪，湿邪宜用利水渗湿法，暑邪宜用清热法，清利之方的代表是天水散这类。如果是燥气夹带火邪，火邪宜用凉泻法，燥邪宜用润燥法，凉润之方的代表是清燥救肺汤这类。其余如风暑、风湿、风燥、风火等，都属于夹证，其治疗方法都可以参照此例。那么兼证又该如何处理呢？例如青壮年出现遗精症状，应当区分是否有梦，有梦者适宜用坎离既济汤这类，无梦者适宜用金锁固精丸这类，这是固定的治法。但如果被湿热邪气所触动，便成为兼证，利湿容易损伤阴液，补阴容易导致湿气停滞，想要利湿而不伤阴的，可以用猪苓汤、六味地黄丸这类；如果湿邪严重的，又应当先治疗湿邪，待湿邪化解后，再使用固涩精气的方法即可。又如老年人虚损，应当区分病证的浅深，病位浅的适宜用六君子汤、四物汤这类，病位深的适宜用固本丸、大造丸这类，这也是固定的治法。如果被风邪客居体内，便成为兼证，发散风邪会进一步损耗正气，补益正气必然会导致邪气闭阻，想要疏散邪气而不损伤正气的，可以用参苏饮、补中益气汤这类；如果风邪严重的，又应当先疏散风邪，待风邪解除后，再补益虚损即可。又如女子月经应当来潮时，必须审查其或提前或推后，提前的属于血热，适宜用丹皮、栀子配伍的四物汤这类；推后的属于血寒，适宜用香附、砂仁配伍的四物汤这类，这是固定治法。如果被寒邪所触动，即成为兼证，考查诸方中能散寒且能调理月经的，如香苏饮这类，如果寒邪过盛，必须先散发寒邪，然后再调理月经就可以了。又如妇人产后发热，必须辨别其属于虚证还是实证，虚证适宜补益，如加味四物汤这类；实证适宜破瘀，如生化汤、失笑散这类，这是固定治法。假如被暑邪所感，即成为兼证，考查诸方中能清暑且治疗产后病的，如竹皮大丸这类，如果暑邪过盛，必须先清除暑邪，然后再治疗产后病就可以了。医者若能如此灵活变通，那么治疗夹证和兼证，又有什么困难呢！
People generally claim that complicated syndromes (Jia Zheng) and concurrent syndromes (Jian Zheng) are difficult to treat, but I, Lei Feng, assert that they are not difficult at all. What constitutes a complicated syndrome? For instance, contracting wind pathogen results in Wind-Cold injury (Shang Feng), for which formulas such as Guizhi Tang (Cinnamon Twig Decoction) are appropriate; contracting cold pathogen results in Cold Damage (Shang Han), for which formulas such as Mahuang Tang (Ephedra Decoction) are appropriate. If both wind and cold pathogens are contracted simultaneously, it is termed a complicated syndrome. Since wind pathogen requires dispersing methods and cold pathogen requires warming methods, the representative formula for warming and dispersing is Guizhi Mahuang Gemi Tang (Half-Guizhi Half-Mahuang Decoction). If summerheat pathogen is complicated with dampness, dampness requires draining methods while summerheat requires clearing methods; the representative formula for clearing and draining is Tianshui San (Tianshui Powder). If dryness qi is complicated with fire, fire requires cooling methods while dryness requires moistening methods; the representative formula for cooling and moistening is Qingzao Jiufei Tang (Clear Dryness Rescue Lung Decoction). The remaining combinations, such as wind-summerheat, wind-dampness, wind-dryness, and wind-fire, all belong to complicated syndromes, and their treatment methods can be modeled on this principle. How then should concurrent syndromes be handled? For example, in young adults presenting with spermatorrhea, one must distinguish whether dreams are present or absent. If dreams are present, formulas such as Kanli Jiji Tang (Kanli Jiji Decoction) are appropriate; if absent, formulas such as Jin Suo Gu Jing Wan (Golden Lock Essence-Securing Pill) are appropriate. This is a fixed method. However, if triggered by damp-heat pathogen, it becomes a concurrent syndrome. Draining dampness may injure Yin, while nourishing Yin may stagnate dampness. To drain dampness without injuring Yin, one may use Zhuling Tang (Polyporus Decoction) or Liuwei Dihuang Wan (Six-Ingredient Rehmannia Pill); if dampness pathogen is severe, one should first treat the dampness, and only after the dampness is resolved should essence-astringent methods be employed. Similarly, for elderly patients with deficiency damage, one must distinguish the depth of the syndrome. For shallow conditions, formulas such as Liujunzi Tang (Six Gentlemen Decoction) or Siwu Tang (Four Substance Decoction) are appropriate; for deep conditions, formulas such as Guben Wan (Root-Fixing Pill) or Dazao Wan (Great Creation Pill) are appropriate. This is also a fixed method. If invaded by wind pathogen, it becomes a concurrent syndrome. Dispersing wind further depletes healthy Qi, while tonifying healthy Qi inevitably traps the pathogen. To disperse pathogen without damaging healthy Qi, one may use Shensu Yin (Ginseng and Perilla Infusion) or Buzhong Yiqi Tang (Tonify the Middle and Augment the Qi Decoction); if wind pathogen is severe, one should first disperse the wind, and only after the wind pathogen is resolved should tonification for deficiency be performed. Regarding women whose menstruation is due, one must examine whether it arrives early or late. Early arrival indicates blood heat, treated with Danpi and Gardenia combined with Siwu Tang (Four Substance Decoction); late arrival indicates blood cold, treated with Xiangfu and Amomum combined with Siwu Tang. This is a fixed method. If triggered by cold pathogen, it becomes a concurrent syndrome. One should consult formulas that can dispel cold and regulate menstruation, such as Xiangsu Yin (Perilla and Cyperus Infusion); if cold pathogen is excessive, one must first dispel the cold, and then regulate menstruation. For postpartum fever in women, one must differentiate between deficiency and excess syndromes. Deficiency requires tonification, such as Jiawei Siwu Tang (Modified Four Substance Decoction); excess requires breaking stasis, such as Shenghua Tang (Generation of Blood Decoction) or Shixiao San (Instantly Effective Powder). This is a fixed method. If affected by summerheat pathogen, it becomes a concurrent syndrome. One should consult formulas that can clear summerheat and treat postpartum conditions, such as Zhupi Dawan (Bark Large Pill); if summerheat is excessive, one must first clear the summerheat, and then treat the postpartum condition. If a physician can apply such flexible adaptation, what difficulty could there possibly be in treating complicated and concurrent syndromes!