经脉所行，皆起于手足。虚劳则血气衰损，不能温其四大，故四肢逆冷也。
积聚者，腑脏之病也。积者，脏病也，阴气所生也；聚者，腑病也，阳气所成也。虚劳
之人，阴阳伤损，血气凝涩，不能宣通经络，故积聚于内也。
瘕病者，皆由久寒积冷，饮食不消所致也。结聚牢强，按之不转动为症；推
之浮移为瘕。虚劳之人，脾胃气弱，不能克消水谷，复为寒冷所乘，故结成此病也。
肺主于气，气为阳，气有余则喘满逆上。虚劳之病，或阴阳俱伤，或血气偏损，今是阴
不足，阳有余，故上气也。
虚劳之人，血气微弱，阴阳俱虚，小劳则生热，热因劳而生，故以名客热也。
虚劳伤于肺，故少气。肺主气，气为阳，此为阳气不足故也。其汤熨针石，别有正方。
补养宣导，今附于后。
《养生方·导引法》云∶人能终日不涕唾，随有漱漏咽之。若恒含枣核而咽之，令人受
气生津液，此大要也。
虚劳而热者，是阴气不足，阳气有余，故内外生于热，非邪气从外来乘也。
丈夫无子者，其精清如水，冷如冰铁，皆为无子之候。又，泄精精不射出，但聚于阴头
，亦无子。无此之候，皆有子。交会当用阳时；阳时，从夜半至禺中是也；以此时有子，皆
聪明长寿。勿用阴时；阴时，从午至亥；有子皆顽暗而短命，切宜审详之。凡妇人月候来时
，候一日至三日，子门开，若交会则有子；过四日则闭，便无子也。
男子脉得微弱而涩，为无子，精气清冷也。
经脉的循行路线，都起始于手和足。虚劳病会导致血气衰败亏损，无法温煦四肢（即双手双足），因此出现四肢逆冷（手脚冰凉）的症状。
虚劳导致血气衰弱，阴阳之气运行不畅，邪气趁机侵袭，冷热之气在体内相互交争，因此产生烦扰疼痛的症状。
积聚是腑脏的疾病。积证，属于脏的病，由阴气生成；聚证，属于腑的病，由阳气形成。虚劳病人，阴阳受到损伤，血气凝滞涩阻，不能宣通经络，因此气血在体内凝聚成积块。
瘕病，都是由久寒积冷、饮食不消化所导致的。结聚坚硬牢固，按压时不移动的是“症”（zheng，指有形可征的肿块）；推之可以浮移变动的是“瘕”（jia，指无形或聚散无常的包块）。虚劳病人，脾胃之气虚弱，不能运化消除水谷，再加上被寒冷邪气侵袭，因此结成这种病。
肺主管气，气属于阳，气有余则会出现喘息、胸满、气逆上冲的症状。虚劳病，有的是阴阳俱伤，有的是血气偏损，现在是阴不足而阳有余，所以出现上气（气逆上冲）的症状。
虚劳病人，血气微弱，阴阳都虚弱，轻微劳作就会产生热象，这种热是因为劳作而产生的，所以称为客热（外来或继发之热）。
虚劳损伤了肺，所以少气（气息短促）。肺主气，气属阳，这是阳气不足的缘故。针对这种情况，汤药、熨法、针刺、砭石等治疗，另有专门的方剂。补养和导引（古代一种呼吸吐纳与肢体运动相结合的养生治病方法），现在附在后面。
《养生方·导引法》说：人如果能整天不擤鼻涕、不吐唾沫，随时漱口后咽下津液。如果经常含着枣核一起咽下，能让人受气生津液，这是关键要点。
虚劳伴有发热的，是阴气不足，阳气有余，所以内外都产生热象，这并不是邪气从外部侵袭所致。
男子没有子嗣的情况，其精液清稀如水，冰冷如铁，都是无子的征候。另外，射精时精液不射出，只聚集在阴茎头部，也是无子。如果没有这些征候，都能有子嗣。性交应当选择阳时；阳时，是指从夜半到清晨三点左右；在这个时候受孕，孩子大多聪明长寿。不要选择阴时；阴时，是指从中午到晚上九点；在这个时候受孕，孩子大多愚钝短命，务必仔细审察详辨。凡是妇女月经来潮时，经后第一日至第三日，子门（子宫口）张开，如果此时性交则有子嗣；过了第四日子门关闭，便不会有子嗣。
男子脉象呈现微弱而涩，是无子的征候，说明精气清冷。
The pathways of the meridians all originate from the hands and feet. In deficiency consumption (Xu Lao), blood and qi decline and are damaged, failing to warm the four extremities, thus resulting in cold limbs (coldness extending from the extremities towards the trunk).
In deficiency consumption, blood and qi are weak, and the yin and yang are not harmonious; pathogenic factors take advantage of this weakness. The subsequent struggle between cold and heat pathogens causes vexation and pain.
Accumulation (Ji) and gathering (Ju) are diseases of the fu and zang organs. Accumulation (Ji) is a disease of the zang organs, generated by yin qi; gathering (Ju) is a disease of the fu organs, formed by yang qi. In individuals with deficiency consumption, yin and yang are damaged, and blood and qi become stagnant and obstructed, unable to unblock the meridians; thus, accumulations form internally.
The condition known as Jia (a type of abdominal mass) is caused by long-standing cold and accumulated chill, leading to indigestion of food. A mass that is firm, hard, and does not move upon palpation is called Zheng (a fixed mass); one that can be pushed and moves freely is called Jia (a mobile mass). In individuals with deficiency consumption, the qi of the spleen and stomach is weak, unable to transform and transport water and grain, and further invaded by cold, leading to the formation of this condition.
The lung governs qi. Qi belongs to yang. An excess of qi leads to panting, chest fullness, and rebellious upward flow of qi. In deficiency consumption disease, either both yin and yang are injured, or blood and qi are unevenly damaged. In the current case, yin is insufficient while yang is excessive, resulting in rebellious qi (Shang Qi).
In individuals with deficiency consumption, blood and qi are weak, and both yin and yang are deficient. Slight exertion generates heat. Since this heat arises from exertion, it is termed "guest heat" (Ke Re).
Deficiency consumption damages the lung, resulting in shortness of breath (Shao Qi). The lung governs qi, and qi belongs to yang; this indicates a deficiency of yang qi. For such conditions, decoctions, moxibustion/warming therapies, acupuncture, and stone therapy have separate specific formulas. Nourishing and guiding (Daoyin, an ancient practice combining breathing exercises and physical movement) methods are attached below.
The *Preservation Formula · Guiding Methods* states: If one can refrain from spitting sputum throughout the day and instead swallows saliva whenever it forms, or if one constantly holds a jujube pit in the mouth and swallows it, this promotes the reception of qi and generation of body fluids. This is a key principle.
Deficiency consumption accompanied by fever is due to insufficient yin qi and excessive yang qi, causing heat to arise internally and externally. This is not caused by pathogenic factors invading from the outside.
Regarding men without offspring: if the semen is clear like water and cold like iron, these are signs of infertility. Additionally, if ejaculation occurs but the semen does not shoot out, merely pooling at the glans penis, this also results in infertility. Absence of these signs implies fertility. Intercourse should be performed during the "yang time"; yang time refers to the period from midnight to approximately 3:00 AM. Conception during this time tends to produce children who are intelligent and long-lived. One should avoid the "yin time"; yin time refers to the period from noon to 9:00 PM. Conception during this time tends to produce children who are dull and short-lived. Careful consideration is essential. Regarding women, when menstruation has just ended, from the first to the third day, the uterine opening (Zi Men) is open; intercourse during this window may lead to conception. After the fourth day, it closes, and conception will not occur.
If a man's pulse is weak, thready, and choppy (Wei, Ruo, Se), it indicates infertility due to clear and cold essence and qi.