Moxibustion: Summer or Winter? The Sales Paradox Reveals Two Complementary Strategies

Introduction – A Striking Paradox

When consulting the great classics of Chinese medicine, one certainty seems to emerge: summer is the ideal season for practising moxibustion. The Huangdi Neijing teaches us to "nourish Yang in spring and summer", and the famous strategy of Dongbing Xia Zhi (treating winter diseases in summer) is well documented.

Yet, as a moxa seller, my on-the-ground observation is the opposite: orders surge in winter, when the cold sets in and pain returns.

This paradox – summer in theory, winter in practice – is not a contradiction. It simply reveals two different uses: a preventive and curative use (summer) and a maintenance and symptomatic use (winter). Let us look at what the original Chinese texts say, and then how the daily cycle extends this logic.

1. What the Chinese Classics Say

The Huangdi Neijing: Grounding Practice in the Seasons

The Suwen (chapter Siqi Tiaoshen Da Lun) states:

« 春夏养阳，秋冬养阴，以从其根 »
« Nourish Yang in spring and summer, nourish Yin in autumn and winter, to align with the root. »

In summer, celestial yang qi is at its peak; the body's yang rises to the surface and the pores are open. This is the favourable moment to strengthen yang and expel cold-type pathogens.

The Lingshu: A Winter Indication

The Lingshu (chapter 19, Sishi Qi – 四时气) specifies for acupuncture:

« 冬取井荥，必深以留之 »
« In winter, needle the Jing and Ying points, deeply and with prolonged retention. »

Although referring to needling, the logic also applies to moxibustion: in winter, yang is withdrawn inward. If moxibustion is used, it is done more gently and deeply, to support without dispersing.

Caution Against Extremes: A Traditional Maxim

A maxim often cited in Chinese medical literature advises:

« 天寒无刺，天温无灸 »
« In great cold, avoid acupuncture; in great heat, avoid moxibustion. »

This rule does not mean "never use moxibustion in summer". Its origin (in the Suwen, chapter Ba Zheng Shen Ming Lun) indicates rather that acupuncture is less effective in cold weather, and moxibustion less necessary in hot weather since yang already circulates freely. It is a warning against climatic excesses, not an absolute prohibition.

Sun Simiao (Qian Jin Yao Fang): Preventive Moxibustion

Sun Simiao, the great physician of the Tang dynasty, is famous for:

« 上医治未病之病 »
« Great physicians treat illness before it appears. »

He advocates moxibustion in summer to prepare the body for winter, laying the foundations of seasonal prevention.

Ge Hong (Zhou Hou Bei Ji Fang): Early Witness to Indirect Moxibustion

Ge Hong (4th century) did not theorise the Dongbing Xia Zhi, but his Zhou Hou Bei Ji Fang contains one of the earliest detailed descriptions of indirect moxibustion (using garlic, ginger or salt). These techniques soften the heat, reduce the risk of burns, and are particularly suited to summer practice.

Zhang Lu (Zhangshi Yitong, Qing): Contribution to the Sanfu

The practice of the three canicular periods (Sanfu, 三伏) predates the Qing dynasty (traces dating back to the Northern and Southern dynasties). During the Qing, Zhang Lu contributed to its formalisation and dissemination in his Zhangshi Yitong, combining moxa with herbal patches applied to the skin. This is the current reference for Dongbing Xia Zhi.

2. Untangling the Paradox: Winter Maintenance vs Summer Cure

In Winter: Maintenance Moxibustion

In winter, the cold attacks: joint pain, lower back pain, painful periods, slow digestion. Moxibustion acts as support:

• It warms the meridians (温经散寒),
• It relieves acute symptoms,
• It limits the impact of cold on a weakened yang.

This is a reactive and symptomatic use, which explains winter purchasing peaks: an immediate need for warmth.

In Summer: Curative and Preventive Moxibustion

In summer, the body's yang is at its maximum. Moxibustion no longer merely relieves; it treats the root:

• Strengthening yang to resist future winters,
• Expelling chronic cold (arthritis, cold asthma, morning diarrhoea),
• Acting on the terrain, not the symptoms.

This is the essence of Dongbing Xia Zhi. For the patient, it is less urgent than relieving winter pain, but deeper and more lasting.

In summary:
Winter = maintenance moxibustion (limiting the impact of cold).
Summer = curative and preventive moxibustion (treating the cause).

3. The Parallel with the Daily Cycle: Morning and Noon, Like Spring and Summer

Chinese medicine applies the same logic to the day as to the year. In the year, yang is born in spring, reaches its peak in summer, then declines. During the day, yang is born in the morning, reaches its peak at noon, then declines.

To strengthen yang (prevention, cure), the best times are when yang is in its ascending phase or at its peak:

• In the year: spring and summer (especially summer, the Sanfu period).
• During the day: morning (9am–11am) and noon (11am–1pm).

Conversely, using moxibustion in winter or in the evening is more of a maintenance or symptomatic relief approach: supporting a withdrawn yang, without the benefit of its natural momentum.

Hourly Recommendations by Meridian

For more targeted treatment, one can also follow the energetic flow of the meridians (Ziwu Liuzhu):

In practice:

• For a general well-being / vitality goal: practise between 9am and 1pm.
• For a specific issue: choose the time slot of the relevant organ.
• Avoid practising after 9pm so as not to disturb sleep.
• If you cannot follow these time slots, practise anyway: moxibustion at a suboptimal time is better than none at all.

4. What to Do During a Heatwave?

During exceptional heat (heatwave > 35°C), the maxim « 天温无灸 » makes perfect sense: avoid moxibustion to prevent exhausting yin, avoid discomfort and reduced effectiveness.

Recommended approach:

• Avoid days of very intense heat (≥ 35°C).
• Prefer cooler hours (early morning or evening).
• In normal summer weather, moxibustion is not only permitted but recommended.

5. Modern Precautions and Contraindications

For safe practice, avoid moxibustion in the following cases:

• High fever or acute heat-type inflammation,
• Sensory neuropathy (advanced diabetes, loss of sensation),
• Severe circulatory disorders,
• Damaged skin (wounds, eczema, burns),
• Pregnancy (certain abdominal and lumbar points),
• Exhausted Yin state with internal heat (thirst, night fever, rapid pulse).

If in doubt, consult a qualified practitioner.

6. The Fundamental Therapeutic Principle: « 寒者热之 »

The Huangdi Neijing states the rule:

« 寒者热之 »
« Cold is treated with heat. »

Summer moxibustion applies this principle: using ambient natural heat as an ally to dislodge chronic cold. The body, in summer, is receptive and open. Therapeutic heat harmonises with the heat of the sky.

Conclusion – Two Seasons, Two Uses, One Wisdom

The sales paradox is only apparent. It reminds us of a fundamental truth: moxibustion does not have a single right moment, but several moments suited to different goals.

So, whether you are a practitioner or an individual:

• Practise a summer cure (a few sessions during the Sanfu, preferably in the morning or at noon) to prepare for winter.
• Use moxibustion in winter (or in the evening) to calm cold-related pain.
• Avoid extreme heatwaves.
• Respect modern contraindications.

Chinese medicine is not a collection of prohibitions, but an art of adapting to the rhythms of nature and the needs of each individual.