Autumn has a quality unlike any other season – a particular clarity in the light, a cooling in the air, a sense of things completing and releasing. Leaves fall. Days shorten. There is beauty in it, and also a particular kind of melancholy that many people recognise but find difficult to name. In Traditional Chinese Medicine, this emotional tone is entirely expected: autumn is the season of the Lung, and the emotion associated with the Lung is grief, or more precisely, the feeling of letting go.
The Metal Element: Autumn in Traditional Chinese Medicine
In TCM, autumn belongs to the Metal element – the element of structure, precision, purity, and value. The organs associated with Metal are the Lung and the Large Intestine. The Lung, in TCM, governs far more than breathing: it oversees the defensive Qi (Wei Qi) that protects the body's surface from external pathogens, governs the skin and body hair, controls the descending and dispersing of Qi throughout the body, and regulates the body's relationship with the external world through breath.
The Large Intestine, paired with the Lung, governs the physical function of letting go – the release of what the body has taken in and used, retaining what is valuable and releasing what is not. In TCM's typically elegant symmetry, the Lung and Large Intestine govern letting go at every level: physically (breathing out, eliminating waste), emotionally (releasing grief, processing loss), and mentally (letting go of what is no longer needed in order to make space for what comes next).
When the Metal element is in balance, a person has a refined sense of what matters, the ability to appreciate beauty and quality, the emotional resilience to grieve and release, and clear, healthy boundaries with the world. When it is out of balance, the person may struggle to let go – physically (constipation, congestion, holding on) or emotionally (unprocessed grief, rigidity, difficulty with endings).
What Your Body May Be Doing in Autumn
From a Western physiological perspective, autumn brings significant changes. As daylight decreases, melatonin production rises earlier and serotonin begins to drop – contributing to changes in mood, sleep, and energy that many people notice as a kind of heaviness after the brightness of summer. Vitamin D synthesis essentially stops in the UK from around October onwards, and immune function typically begins to shift as the body encounters more time indoors and more circulating viruses.
The Lung system in TCM specifically governs the body's defensive response to external pathogens – colds, respiratory infections, and skin complaints are particularly common autumn presentations in TCM practice. The dryness that characterises autumn air is also relevant: dry air impairs the mucous membranes of the respiratory tract, reducing their effectiveness as a barrier. The TCM emphasis on nourishing Lung Yin and moisture in autumn reflects this physiology precisely.
Common Autumn Patterns to Watch For
- Increased susceptibility to colds and respiratory infections – in TCM, the Lung's Wei Qi (defensive Qi) is most vulnerable in autumn; building immune resilience now is a specific seasonal priority
- Dry skin, lips, and throat – autumn's dryness affects the surfaces the Lung governs; skin can become tight and flaky, the throat dry, and the nose more prone to dryness and irritation
- Melancholy or a sense of wistfulness – the emotion of the Metal element; a natural response to the season's quality of contraction and release
- Constipation or changes in bowel habit – the Large Intestine's autumn susceptibility; dietary changes and reduced hydration in cooler weather can affect regularity
- Changes in skin quality – eczema and other skin conditions may flare in autumn as the Lung system adjusts to the season's demands
- Fatigue and a desire to slow down – entirely appropriate; the season is naturally more contracting and inward-facing than spring and summer
- Changes in sleep – earlier melatonin rise means many people feel sleepy earlier; working with this rather than against it is the TCM approach
Autumn as a Season of Letting Go
One of autumn's most important gifts – if it can be received – is the invitation to let go. The natural world models this explicitly: the tree does not cling to its leaves, and the leaves themselves are the most beautiful precisely at the moment of release. TCM sees autumn as the ideal season for clearing out what is no longer needed – not only literally (clearing the home, releasing old commitments), but emotionally: processing grief, acknowledging endings, allowing the weight of things that didn't resolve in summer to be held and then released.
This doesn't mean forcing emotional processing or pretending to feel things one doesn't. It means creating conditions – quieter routines, more time in nature, perhaps a return to journalling or creative practice – in which the natural movement of the season can be met consciously.
What Supports the Body in Autumn
The key autumn health priorities, from both Western and TCM perspectives, align closely: protect and strengthen the respiratory immune system, nourish moisture and Yin to counteract autumn dryness, begin moving from lighter summer eating to warmer and more nourishing foods, and allow the daily rhythm to contract a little – earlier evenings, more rest, less of the constant outward activity that summer sustains. Specific foods, herbs, and practices for autumn are explored in the accompanying articles in this series.