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Ancient texts state: Enduring the urge to urinate without relieving oneself can lead to five types of Lin syndrome (diseases characterized by frequent, urgent, and painful urination); cold knees can lead to Bi syndrome (diseases characterized by pain, numbness, and impaired movement of joints and limbs). Enduring the urge to defecate without relieving oneself can lead to five types of hemorrhoids. Straining during urination can cause Hong Kong jiao (a general term for disorders of the lower limbs such as swelling, pain, or weakness); straining during defecation can cause lower back pain and dry eyes.

If one is eating, riding a horse at speed, walking briskly, or being compelled by cold-heat pathogens, it may cause the bladder to twist, resulting in pain below the umbilicus. If the bladder becomes folded and closed, preventing urination, it can even lead to death.

Do not forcibly hold back or excessively endure bowel or bladder movements. Sudden loss of control, whether manifesting as urinary retention or diarrhea, will all damage Qi and harm life, causing rapid and severe consequences.

Liu Weijian arrived at Gan Ning Jun, where someone presented "Jinhua Wan" (Golden Flower Pill) to reduce urine volume. The medicine contained arsenic and wax. After taking it for two days, urine output was extremely low. Upon reaching Bazhou, the entire body became swollen. This was because the water pathways were blocked, causing water to overflow and move recklessly. Had he not encountered Dr. Lu Chang, he would almost have been misled by this treatment. Generally, when water springs do not cease (incontinence), it indicates that the Bladder fails to store. One should administer warm agents to secure the water; how can one forcibly stop it?

The *Suosui Lu* states: Defecating or urinating facing the sunlight, moonlight, or starlight, or facing northwest while doing so, will all shorten one's lifespan.

Ancient texts state: When spring ice has not yet melted, clothing should be thick at the bottom and thin at the top. This nurtures Yang and collects Yin, thereby extending life and promoting longevity. In spring, one must not wear thin clothes, otherwise one may suffer from Cold Damage, Cholera, indigestion, and headache.

Changing clothes after profuse sweating is good. Washing immediately is also acceptable. Wet or sweaty clothes should not be worn for long, as they can cause sores, wind-rash, and dysfunction of the bowels and bladder. Taking off only half of one's clothes after profuse sweating can lead to Pi Feng (hemiplegia due to wind-stroke). Taking off boots and socks while sweating from drunkenness and cooling off in the wind can cause Hong Kong jiao.

In winter, items such as cotton clothes and felt mattresses should be put on quickly when it gets cold and taken off quickly when it gets warm.

Tao Hongjing said: Do not add cotton clothes all at once; when slightly warm, it is appropriate to take them off temporarily.

The *Suosui Lu* states: "To seek peace and joy, neither take off nor put on [clothes excessively]" is a Northern saying; "To seek peace and joy, frequently take off and put on [clothes]" is a Southern saying.

The *Neijing* states: When Yang Qi goes out, go out; when Yang Qi enters, enter. Do not disturb the sinews and bones, and do not expose yourself to fog and dew. Violating this even for a moment will cause the physical form to become exhausted and weak.

The Classics state: Do not expose yourself to extreme cold, extreme heat, strong winds, or heavy fog. Pathogenic Qi from Heaven, if contracted, injures the Five Zang Organs; cold and heat from food and drink, if contracted, injure the Six Fu Organs; dampness from Earth, if contracted, injures the skin, flesh, sinews, and vessels.

The sages say: Humans possess only a handful of Yuan Qi (Primordial Qi); how can they contend with the Great Creation (Nature)? Master Kangjie had the instruction of "Four No-Goes."

Ancient texts state: Exposing oneself to extreme cold allows cold to reach the bone marrow, primarily causing headache radiating upward to the head, and toothache. It also says: If one does not stay away from heat and heat invades, then headache, fever, and muscle pain will arise.

The True Man said: Whether at home or abroad, if suddenly encountering strong winds, heavy rain, thunder, or dark fog, these are passages of dragons, ghosts, and deities. One should enter the room, burn incense, sit quietly, and avoid them. Not coming out afterwards brings good fortune. Otherwise, it can be fatal.

Taboo books state: On the first day of the lunar month (Shuo), one should not weep; on the last day (Hui), one should not sing, as this invites misfortune.