two traditions side by side

How different traditions approach Summer heat

Updated 21 October 2026

Summer heat: Traditional Chinese Medicine and Hong Kong Style each have something to say about it. Here is what each one reaches for, what research has looked at so far, and what to watch out for.

Herbs and practices affect people differently — nothing here suits everyone. Take it as reference.

The problem

By late June the heat has settled in, the air sits heavy, and the body is asking for something different than the winter kitchen served. You stop reaching for the slow stew, reach for cold water more often, sleep light, and wake earlier than you want to. The kitchen tilts toward lighter grains, more greens, fruit taken as a snack rather than a side. The page asks practical questions: what to eat when the appetite is small, what to drink when plain water is not enough, how to keep the body steady through the long hot weeks. None of it replaces staying out of the midday sun, and most of it is what households across several traditions have done for centuries when the temperature climbs.

Tonight, try this

Mung bean soup tonight — soak half a cup of dried mung beans for an hour, simmer in twice the water with a thumb of sliced ginger for forty minutes, then sip the liquid warm or cooled across the evening. Skip the rock sugar, and a small handful of rice added at the end makes it gentler on the gut.

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At a glance

The two traditions compared

What each system reaches for when this comes up. Empty cells are left empty — we do not fill a column just to make it look complete.

Traditional Chinese Medicine

Herbs, foods & customsFood therapy · Customs & ritualsGinger

What the tradition saysSummer under Heart system from Huangdi Neijing xia (chang) framing — mung bean soup with ginger at the warm afternoon hour, bitter melon at lunch, winter melon and barley soup at dinner; cooling direction not for long-term loose stool or already-cold body.

Hong Kong Style

Herbs, foods & customsFood therapy · Customs & rituals

What the tradition saysSummer in the Cantonese kitchen — liang cha (cooling herbal tea) after lunch, watermelon with a small pinch of salt, sour plum (suan mei) in cold water for the afternoon, winter melon and pork-rib soup at dinner, rice at room temperature, kitchen window cracked for the cross-breeze; stronger nian si wei not for daily use.

How each tradition approaches this topic
Tradition	Herbs, foods & customs	What the tradition says
Traditional Chinese Medicine	Food therapy · Customs & ritualsGinger	Summer under Heart system from Huangdi Neijing xia (chang) framing — mung bean soup with ginger at the warm afternoon hour, bitter melon at lunch, winter melon and barley soup at dinner; cooling direction not for long-term loose stool or already-cold body.
Hong Kong Style	Food therapy · Customs & rituals	Summer in the Cantonese kitchen — liang cha (cooling herbal tea) after lunch, watermelon with a small pinch of salt, sour plum (suan mei) in cold water for the afternoon, winter melon and pork-rib soup at dinner, rice at room temperature, kitchen window cracked for the cross-breeze; stronger nian si wei not for daily use.

Two traditions, each with something for this topic

What each one actually does

The table above holds each tradition’s practice and the herbs that sit in that lane. Below, the same traditions open up into longer write-ups — what they do in detail, and where to read on.

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Pregnancy, Breastfeeding & Child Safety

The following herbs are not recommended during pregnancy, breastfeeding, or for children without consulting a healthcare provider: Ginger, Chrysanthemum Flower. Relevant studies are limited, and traditional sources generally advise caution.

Check interactions →

Go deeper, tradition by tradition

Traditional Chinese Medicine

In classical Chinese medicine, summer belongs to the Heart system, and the Suwen chapter of the Huangdi Neijing (c. 2nd century BCE, public domain) describes summer as the season of xia (chang) — growth and flourishing, the body's yang qi at its peak and the surface open, which is also the reason the kitchen shifts in this direction. The matching direction is cooling food, bitter flavours, and food that does not sit heavy in the gut. Three practices sit at the centre. The first is mung bean soup (lu dou tang) — dried mung beans simmered with a slice of ginger, drunk warm or cooled across the hot afternoon, the bitter property carrying the heat-clearing tradition describes. The second is bitter melon stir-fry with eggs or simply blanched, eaten at the same lunch rather than as a side; the Bencao Gangmu (public domain) records bitter as the flavour that carries heat out. The third is a small bowl of winter melon (dong gua) and barley (yi yi) soup at the evening meal — light, hydrating, gentle on the appetite. None of this replaces drinking water in the heat. The tradition expects the same light, cooling pattern kept across the long hot weeks before judging it. Cautions: people with weak digestion find mung beans cold on the gut; the cooling direction is not the right call for a long-term loose stool, and the body's yang is already at its peak, so adding drying or strongly heating ingredients on top goes in the wrong direction.

Hong Kong Style

Hong Kong household practice reads summer heat as something the kitchen addresses through cooling teas, light soups, and a long seasonal list of dishes that have carried the family through hot weeks for generations. Three practices sit at the centre. The first is liang cha (the cooling herbal tea) — usually a brewed blend of dried herbs such as chrysanthemum, honeysuckle, or the stronger nian si wei (24-herb blend) for the heavy, sticky days; a small cup after lunch rather than a mug through the day, the tradition is the dose rather than the volume. The second is the simple fruit direction — watermelon eaten cold with a small pinch of salt, sour plum (suan mei, hua mei) soaked in cold water as the afternoon drink, the citrus-salt effect that households have used for hot afternoons. The third is the kitchen wind-down: a small bowl of winter melon and pork-rib soup at dinner, the rice kept at room temperature rather than hot, and the kitchen window cracked for the cross-breeze the night through. The sources are everyday Cantonese household practice recorded in Hong Kong food writing, with the nian si wei blends and yin ju cha (honeysuckle-chrysanthemum) recorded in herbal shop traditions. Cautions: stronger liang cha blends are not for daily use, and a long-term loose stool or a body that runs cold is a lane where the cooling direction is not the right call.

Disclaimer

Some of the herbs mentioned may interact with sedatives, blood-pressure medication, blood thinners or antidepressants. Check a combination →
This page describes what traditions have used and what research has looked at. It is not a diagnosis and it does not recommend a treatment.
Pregnancy, breastfeeding, children and ongoing symptoms: speak with a qualified health professional first.

Inbox Q&A

Questions people actually ask

What food actually helps the body handle summer heat?

The traditions point at light, cooling meals rather than heavy stews. TCM leans on mung bean soup at the warm afternoon hour, bitter melon at lunch, and winter melon and barley soup at the evening meal. Hong Kong households run liang cha — cooling herbal tea — through the afternoon, watermelon with a pinch of salt, and lighter rice with small-portion soups at dinner. None of this replaces drinking water in the heat, and the cooling direction is not the right call for a long-term loose stool or a body that runs cold. The honest read: the light bowl, the cool drink, the same light hour kept across the hot weeks, sits at the centre.

Is cold water with a meal bad in summer?

The clinical read is that fluid temperature has a small effect on core temperature and a larger effect on comfort in hot weather. The TCM framing suggests warm or room-temperature drinks sit better with a meal even in summer, because cold liquid at the meal asks more of the stomach's heat than the body has to spare. The honest take: if a warm drink at the meal feels better, the habit is easy to keep; if cold water is what the body wants, the case for forcing warm is thin. The habits that matter more are the light bowl, the cooling tea, and the cross-breeze at night.

How long does it take for the body to adjust to hot weather?

Most bodies shift across two to three weeks of consistent hot exposure — sweat starts sooner, the body holds water differently, and appetite tilts toward lighter food. The traditions expect a season-long rhythm: a cooling pattern kept across the hot weeks rather than tried for one heat wave and dropped. The kitchen read: a steady afternoon of light meals, cooling tea, and a small bowl at dinner tends to settle in by the second week. If heat exhaustion, dizziness, or chest tightness appears, that is a clinician's call rather than a kitchen one.

Should I drink more water in summer?

Yes, plainly — most adults need more fluid in hot weather, and the clinical guidance is to drink before the thirst cue becomes sharp. The traditions are about the kitchen side of the same idea: cooling tea taken in the afternoon, fruit with a high water content (watermelon, pear, cucumber), a small bowl of soup at the meal. The honest hedge: fluid needs differ by body, by activity, and by how the day is spent. Plain water at room temperature through the day, with one or two cooling-tea or fruit moments, is the simple combination.

Is it safe to drink liang cha every day in summer?

The lighter blends — chrysanthemum tea, honeysuckle tea, the simple yin ju pair — sit on the everyday lane; a small cup a day is a common household pattern. The stronger blends — nian si wei, the heavy herbal shop bottles — are not a daily drink. The honest read: the dose and the blend matter more than the label. If the body runs cool, the gut is already loose, or a medication is being taken, even a light liang cha is worth a quick check with a clinician. For most households, a light cooling tea at the same afternoon hour, across the long hot weeks, is the centre.

Can I eat cold watermelon every day in summer?

Yes, within reason. Watermelon is the heat-clearing fruit the Cantonese household has used for hot afternoons for generations, and a moderate serving — a slice or two — taken cold with a small pinch of salt is the everyday pattern. The honest read: large amounts of very cold watermelon right before bed can bother the gut overnight, and people with weak digestion find it cold on the stomach. For most households, a moderate afternoon portion, the same hour, across the hot weeks, is the centre.

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Where this comes from

Where the old books are: Huangdi Neijing, Bencao Gangmu, Charaka Samhita, Donguibogam (1613) — all public domain, quoted as ideas rather than text
Where we double-check the modern side: national formularies and public monographs (Chinese Pharmacopoeia, MHLW Kampo list, KIOM / MFDS, EMA) — read for facts, then rewritten in our own words
PubMed abstracts, only for the studies we actually name on this page
Our own notes on Cantonese soup customs — everyday practice, not research