刘河间曰∶带下者，任脉之病也。经云，任脉者，起于中极之下，以上毛际，循腹里，上关元，至喉咽，
上颐循面。任脉自胞上过带脉，贯脐上，其病所发，正在过带脉之分，淋沥，故曰带。
慎斋按∶以上一条，序带病本于任脉之考也。
《圣惠方》曰∶妇人带下者，由劳神过度，损动经血，致令身虚，受于风冷，风冷入于脬络，搏其血之所成也。
巢元方曰∶任脉为经之海，任之为病，女子则为带下。手太阳为小肠经，手少阴为心经。心为脏主里，小肠
为腑主表。二经之血，在妇人上为乳汁，下为月水，冲任所统也。冲任脉起于脬内，阴阳过度，则伤脬络，故
风邪乘虚，入于脬中，损冲任之经，伤太阳少阳之血，致令脬络之间，秽与血相兼带而下，冷则白，热则赤。
严用和曰∶妇人赤白带下，此由劳伤冲任，风冷据于胞络，妇人平居，血欲常多，气欲常少，而疾不生。或
气倍于血，气倍生寒，血不化赤，遂成白带。若气平血少，血少生热，血不化红，遂成赤带。寒热交并，赤白
俱下，其脉右尺浮，浮为阳，阳绝者无子。若足冷带下，轻则漏下，甚则崩中，皆心不荣血，肝不藏血所致。
Liu Hejian stated: Dai-xia (leukorrhea) is a disease of the Ren Mai (Conception Vessel). The Classics state that the Ren Mai originates below Zhongji (CV3), ascends to the pubic region, follows the interior of the abdomen, reaches Guanyuan (CV4), and continues up to the throat, passing the chin and circulating along the face. The Ren Mai passes above the Bao Gong (uterus) through the Dai Mai (Girdle Vessel), penetrates the umbilicus, and ascends. Its pathological manifestation occurs precisely at the section where it crosses the Dai Mai, with discharge dripping continuously; hence it is called "Dai" (belt/leukorrhea).
Shen Zhai commented: The preceding passage serves as an examination of the origin of Dai-bing (disease of leukorrhea) lying in the Ren Mai.
The *Taiping Shenghui Fang* states: In women, Dai-xia arises from excessive mental labor, which damages the menstrual blood, causing bodily deficiency. This allows Wind-Cold pathogens to invade; when Wind-Cold enters the Pao Luo (bladder/connective tissue network), it contends with the blood, resulting in this condition.
Chao Yuanfang stated: The Ren Mai is the sea of the meridians. When the Ren Mai is diseased, women suffer from Dai-xia. The Hand-Taiyang Meridian is the Small Intestine Meridian, and the Hand-Shaoyin Meridian is the Heart Meridian. As Zang organs govern the interior, the Heart governs the interior; as Fu organs govern the exterior, the Small Intestine governs the exterior. The blood of these two meridians, in women, transforms upward into breast milk and downward into menstruation, both governed by the Chong Mai (Penetrating Vessel) and Ren Mai. The Chong and Ren Mai originate within the Pao Gong. Excessive sexual activity injures the Pao Luo, allowing Wind pathogens to enter the Pao Gong due to deficiency. This damages the Chong and Ren Mai and injures the blood of the Taiyang and Shaoyang meridians. Consequently, between the Pao Luo, turbid matter and blood mix and flow down with the Dai Mai. Cold patterns present as white discharge, while Heat patterns present as red discharge.
Yan Yonghe stated: Red and white Dai-xia in women results from fatigue injuring the Chong and Ren Mai, with Wind-Cold occupying the Pao Luo. Normally, in women, blood should be abundant and Qi relatively scarce for health to be maintained. If Qi exceeds Blood, excess Qi generates Cold; if Blood fails to transform into red, white Dai-xia forms. If Qi is balanced but Blood is deficient, deficiency of Blood generates Heat; if Blood fails to transform into red, red Dai-xia forms. When Cold and Heat intermingle, both red and white discharges occur. The pulse at the Right Chi position is floating; a floating pulse indicates Yang. If Yang is exhausted, conception is impossible. If cold feet accompany Dai-xia, mild cases involve Lou-xia (metrorrhagia/non-menstrual spotting), and severe cases involve Beng-zhong (metrorrhagia/heavy bleeding). These are caused by the Heart failing to nourish Blood and the Liver failing to store Blood.
Yang Renzhai stated: The affliction of Dai-xia stems from the lingering retention of Wind-Cold. First, use Guan Gui (Cinnamon Twig), Gan Jiang (Dried Ginger), Xi Xin (Asarum), and Bai Zhi (Angelica Dahurica) to dissipate the Cold pathogen. Subsequently, employ solidifying methods using Zhu Ru (Atractylodes Macrocephala), Bai Zhu (Atractylodes Lancea), and Ren Shen (Ginseng) to tonify Qi.