Does getting irritable more easily as temperatures rise stem from psychological issues or physical responses
2026-07-10
Why Do We Get Irritable in Hot Weather? Psychological or Physical Response?
In recent days, many regions across China have experienced continuous high temperatures. As temperatures keep rising, topics related to “heat rage” have frequently topped social media search trends. Many citizens admit that in hot weather, their emotions are easily out of control — they often feel irritable over trivial matters, lose their temper unprovoked, or even find everything around them unbearable. Many people wonder: Is the frequent irritability in summer a psychological effect, or a genuine physical response caused by high heat?
Hou Zhenghua, deputy chief physician of the Psychosomatic Medicine Department at Zhongda Hospital Affiliated to Southeast University, stated: There is no formal disease diagnosis called “heat rage” in clinical medicine, but high-temperature environments do significantly lower people’s emotional thresholds, making them more irritable and impulsive. This phenomenon has clear scientific and physiological foundations.
Physiological Mechanisms: Why Heat Makes Us Irritable
Hou Zhenghua pointed out that the core reason high temperatures worsen our temper lies in multiple physiological changes in the body. Continuous high heat keeps the human body in a state of thermal stress. To dissipate heat, the heart rate, blood vessels, and sweat glands work at high capacity, leaving the body exhausted and tense. This state directly interferes with the brain’s emotional regulation system, suppressing the prefrontal cortex (responsible for rational self-control) and reducing emotional management abilities, while making the amygdala (responsible for emotional outbursts) more sensitive. Even minor stimuli can trigger irritability or anger.
At the same time, stuffy weather often causes difficulty falling asleep, shallow sleep, or insufficient sleep. Poor sleep quality significantly reduces the brain’s ability to process negative emotions, lowers emotional tolerance, and makes people impatient and irritable.
Additionally, sweating in high temperatures leads to significant loss of water and electrolytes. Even mild dehydration — losing just 1%–2% of body weight in water — can cause fatigue, headaches, reduced concentration, and emotional fluctuations, which are also key triggers for unexplained irritability in summer.
Practical Methods to Regulate Heat-Induced Irritability
To help citizens cope with summer heat and maintain emotional stability, Hou Zhenghua provided simple and actionable adjustment methods:
Stay Hydrated Proactively: Abandon the habit of drinking only when thirsty. Drink small amounts frequently. Outdoor workers or those exposed to prolonged sunlight can appropriately replenish electrolyte water or light saltwater to replace lost fluids and electrolytes, maintaining stable bodily function.
Optimize Sleep Environment: Adjust indoor temperature before bedtime by opening windows for ventilation or using cooling devices. Create a cool and comfortable sleep environment to ensure sufficient, high-quality sleep, stabilizing emotional state from the root.
Avoid Peak Heat Hours: Reduce physical stress during the hottest part of the day. From 10 AM to 4 PM in summer, temperatures reach their peak. Minimize outdoor activities during this period. If going out is necessary, ensure proper sun protection and cooling measures, shorten exposure time to high heat, and reduce the body’s thermal stress burden.
Calm Down Immediately When Emotions Surge: When feeling irritable or about to lose control, stop what you’re doing, leave the stuffy environment, and sit quietly in a cool or air-conditioned room. After the ambient temperature drops, the brain’s emotional regulation function will recover quickly, and negative emotions can be effectively alleviated.
When to Seek Medical Help
Hou Zhenghua reminded: Occasional irritability or anger triggered solely by high-temperature weather is a normal physiological phenomenon. It will subside on its own when temperatures drop and the environment cools down, so there’s no need for excessive anxiety. However, if low mood, anxiety, or irritability persist for weeks or longer, fail to improve after leaving the hot environment or adjusting sleep and hydration, and already affect normal work and life — even accompanied by long-term insomnia, abnormal appetite, or reduced interest in activities — it is no longer caused solely by weather factors. In such cases, it is recommended to visit the psychosomatic medicine department of a regular hospital in time to rule out underlying causes and receive professional intervention. (Liaowang New Era)
Edit：WENWEN Responsible editor：LINXUAN
Source：Yangtse Evening Post
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