12/08/2026
How four different medical traditions understand what heat actually does to the body, and how they suggest we adapt.
The traditional Chinese calendar divides the year into 24 solar terms. 大暑, “Great Heat,” marks one of the hottest periods of the year.
In TCM theory, summer heat (暑) is an external pathogenic factor that directly consumes Qi and body fluids, often combining with dampness (暑濕) to weigh down the body. Because summer corresponds with the Heart, heat exposure isn't just about surface temperature, it impacts core vitality and mental calm.
The response is protecting fluids, moderating exertion, and adjusting daily rhythms to match the seasonal shift.
Ayurveda divides the year into six seasonal cycles. Grishma Ritu (summer) is classically described by intense heat and dryness, causing physical strength (Bala) to naturally decline.
To counter this, Ayurveda uses ritucharya (seasonal regimens). Rather than maintaining a static routine year-round, food, movement, and rest are continuously recalibrated.
A modern detail: The popular wellness idea that “summer is Pitta season” oversimplifies the classical text. Doshas accumulate, aggravate, and subside in dynamic cycles across the year, showing a much more subtle model of environmental adaptation than social media often depicts.
Unani medicine integrated Greek, Persian, Arab, and Indian medical knowledge. In Unani physiology, environmental heat directly impacts the body’s internal temperament (Mizāj), increasing yellow bile (Safra) and depleting innate moisture and vital energy.
To counteract this internal heating, classical Unani physicians developed Tadābīr-i-Mausam, a tailored regimen adjusting diet, bathing, physical exertion, and sleep environments.
A 2021 review comparing classical Unani guidance with modern biomedical evidence found strong alignment on core protective measures: reducing direct sun exposure, slowing physical exertion, maintaining hydration, and wearing lightweight clothing.
Modern biomedicine approaches heat through thermoregulation.
When external temperatures rise, the cardiovascular system works overtime - increasing heart rate, expanding peripheral blood vessels toward the
