三滑者。阳也。指下寻之。三关如珠动。按之即伏。不进不退。曰滑。主四肢。困
弊。脚手酸疼。小便赤涩。
滑者。阳水也。何为阳水。谓水中有火也。夫滑与涩相反。荣气不足。则脉
往来蹇涩。荣气有余。则脉往来流利。故其论曰。滑之体。非独阳也。非独
阴也。乃纯阳正阴。和合交结然。所以然者何也。盖人身左肾属水。右肾
属火。膀胱为水。三焦为火。阴阳相维。水火相济。故脉道往来滑利。而无
蹇涩之患。此平人之常脉耳。今诀所谓滑者。乃水中之火太甚。煎熬腾
沸。故指下寻之。三关如珠动。如珠动者。即刘氏所谓如荷叶上。水珠。言
其往来流利也。按之即伏。不进不退者。即脉经所谓浮中如有力。言其
不任寻按也。故所主病。为四肢困弊。四肢属脾土。困弊者。谓相火盛而
乘其脾土也。脚手酸疼者。谓相火盛而煎熬其肾水也。小便赤涩者。三
焦属相火。为决渎之官。今既不守本位。与前之太阳合。从阳化则热。故
小便赤涩也。
按脉经云。滑脉往来。前却流利。展转替替。然与数相似。一曰浮中如有
力。一曰漉漉如欲脱。丹溪心法云。滑为血实有痰。仲景书问曰。奄翕沉
名曰滑。何谓也。师曰。沉为纯阴。翕为正阳。阴阳和合。故脉滑也。
又按脉经云。脉滑者。多血少气。脉涩者。少血多气。
三滑脉，属于阳脉。在指下寻按之时，寸、关、尺三部脉搏跳动如同圆珠滚动，重按时脉搏潜伏，不向前推进也不向后退缩，这称为滑脉。它主要主病四肢倦怠乏力，手脚酸痛，小便颜色红赤且排尿涩滞不畅。
滑脉，属于阳水之象。什么是阳水？是指水中含有火气。滑脉与涩脉性质相反，当营气不足时，脉气往来艰涩不畅；当营气有余时，脉气往来流利顺畅。所以论述中说：滑脉的体性，并非单纯属阳，也非单纯属阴，而是纯阳与正阴和谐交融结合的状态。为什么会这样呢？因为人体左肾属水，右肾属火，膀胱属水，三焦属火，阴阳相互维系，水火相互济助，所以脉道往来滑利，而没有艰涩的病患。这是健康人正常的脉象。如今歌诀中所说的滑脉，乃是水中的火气过于旺盛，煎熬沸腾所致。所以在指下寻按时，三部脉搏如珠子滚动。所谓如珠子滚动，就是刘氏所说的像荷叶上的水珠，形容其往来流利。重按时脉搏潜伏，不前进也不后退，就是《脉经》所说的“浮取中取如有力”，形容其不能承受过度的寻按。因此它所主的病症，是四肢倦怠乏力。四肢归属于脾土，所谓的倦怠乏力，是因为相火（命门之火）过盛而克制了脾土。手脚酸痛，是因为相火过盛而煎熬耗伤了肾水。小便红赤涩滞，是因为三焦属相火，作为决渎之官（疏通水道的器官），现在它不守本位，与前文的太阳经相合，随阳气转化而产生热邪，所以导致小便红赤涩滞。
按照《脉经》记载：滑脉往来流利，前后滑动，连续不断，然而与数脉相似。一种说法是“浮取中取如有力”，另一种说法是“漉漉有声仿佛要脱落”。《丹溪心法》说：滑脉代表血实且有痰饮。张仲景在《伤寒论·辨脉法》中问道：“奄忽翕沉称为滑脉，这是什么意思？”老师回答说：“沉脉属纯阴，翕脉属正阳，阴阳和谐交融，所以脉象表现为滑。”
又按照《脉经》记载：脉象滑利的，通常多血少气；脉象涩滞的，通常少血多气。
Sanhua pulse (Three-Slide Pulse) is a Yang pulse. When seeking it with the fingers, the pulses at the Cun, Guan, and Chi positions roll like beads; upon pressing, they sink and do not advance or retreat. This is called Huamai (Slippery Pulse). It primarily indicates symptoms of limb fatigue and debility, soreness and pain in the hands and feet, and dark, scanty, or difficult urination.
Huamai represents Yang Water. What is Yang Water? It refers to water containing Fire. Huamai is opposite to Sema (Choppy Pulse). When Ying Qi (Nutritive Qi) is deficient, the pulse flow is sluggish and choppy; when Ying Qi is abundant, the pulse flow is smooth and slippery. Therefore, it is said that the nature of Huamai is neither purely Yang nor purely Yin, but rather a harmonious union of Pure Yang and Correct Yin. Why is this so? The human body’s left Kidney belongs to Water, while the right Kidney belongs to Fire; the Bladder belongs to Water, and the Sanjiao (Triple Burner) belongs to Fire. Yin and Yang sustain each other, and Water and Fire nourish each other, resulting in a smooth and slippery pulse without obstruction. This is the normal pulse of a healthy person. However, the Huamai mentioned in the verse refers to an excessive amount of Fire within the Water, causing boiling and scalding. Thus, when sought with the fingers, the pulses at the three positions roll like beads. Rolling like beads, as described by Liu, is likened to water droplets on a lotus leaf, indicating smooth and slippery flow. Pressing causes them to sink, advancing not and retreating not, which corresponds to the description in the *Mai Jing* (Pulse Classic) as "feeling forceful at superficial and middle depths," indicating that the pulse cannot withstand excessive pressure. Consequently, the diseases it indicates include limb fatigue. The limbs belong to Spleen Earth; fatigue implies that Xianghuo (Ministerial Fire) is excessive and overacts on Spleen Earth. Soreness and pain in the hands and feet imply that excessive Ministerial Fire is scalding and consuming Kidney Water. Dark and difficult urination occurs because the Sanjiao, belonging to Ministerial Fire and serving as the official responsible for draining waterways, has lost its proper position and merged with the Taiyang (Greater Yang) channel. Following Yang transformation generates heat, leading to dark and difficult urination.
According to the *Mai Jing*: Huamai flows smoothly back and forth, rolling continuously, resembling Shumai (Rapid Pulse). One description is "feeling forceful at superficial and middle depths"; another is "gurgling as if about to detach." The *Danxi Xinfa* states: Huamai indicates Blood excess with Phlegm. Zhang Zhongjing asks in the *Shanghan Lun* (Treatise on Cold Damage): "What does 'an xi chen' mean when called Huamai?" The Master replies: "Chen (Deep) is Pure Yin, Xi (Floating/Opening) is Correct Yang. When Yin and Yang harmonize, the pulse becomes slippery."
Furthermore, according to the *Mai Jing*: A slippery pulse usually indicates abundant Blood and deficient Qi, whereas a choppy pulse usually indicates deficient Blood and abundant Qi.