Translation guide
A condition caused by excessive exposure to heat, ranging from mild heat exhaustion to severe heatstroke. In Japanese, the most common umbrella term is 熱中症 (ねっちゅうしょう), but specific terms exist for severity and context.
Referring to any illness caused by heat, from mild to severe.
The standard, everyday term for all heat-related illnesses. Used in weather forecasts, news, and daily conversation.
It's hot today, so be careful of heat prostration.
A slightly old-fashioned term for mild heat exhaustion or summer fatigue. Often used for feeling unwell due to summer heat.
Specifically the milder form, with symptoms like dizziness, nausea, and fatigue.
The most serious form, with high fever, confusion, and possible organ failure.
Heat illness specifically caused by direct exposure to sunlight.
Muscle cramps caused by heat and dehydration.
Medical term for heat cramps. Not commonly used in daily conversation.
Fainting or dizziness due to heat.
Medical term for heat syncope. Rarely used outside medical contexts.
熱中症 is the umbrella term. 熱射病 is severe, life-threatening heatstroke. 日射病 is sunstroke from direct sunlight. In casual speech, 熱中症 is safest. Use 熱射病 for critical cases, and 日射病 when emphasizing sun exposure.
The English phrase 'heat prostration' is not commonly used in modern English; 'heat exhaustion' or 'heatstroke' are more frequent. In Japanese, 熱中症 is the everyday equivalent. Avoid literal translations like 熱の衰弱 (ねつのすいじゃく), which is not a standard term.
He suffered from heat prostration while working outside.
He was taken to the hospital with heat prostration.
暑気あたりで食欲がない。
I have no appetite because of the heat.
Medical term for heat exhaustion. Used in clinical or official contexts.
Symptoms of heat exhaustion include dizziness and nausea.
Literally 'mild heatstroke', commonly used in everyday language to describe non-severe heat illness.
I think I have a mild case of heat prostration.
Medical and news term for classic heatstroke, often caused by direct sun exposure. Implies a critical condition.
Some people die from heatstroke.
Literally 'severe heatstroke', used when the exact medical term is not needed.
He was admitted to the ICU with severe heat prostration.
Literally 'sun radiation disease'. Often used interchangeably with heatstroke in casual contexts, but technically refers to illness from direct sun.
Wear a hat to avoid sunstroke.
I got heat cramps during exercise.
Heat syncope is one symptom of heat illness.
熱中症は十分な水分補給で予防できます。
Heat prostration can be prevented by drinking enough water.