Understanding ～症
The suffix ～症 (しょう) is used in Japanese to denote diseases, syndromes, or medical conditions. It is attached to the root word that describes the symptom or cause, such as 花粉 (pollen) in 花粉症 (hay fever) or ストレス (stress) in ストレス症 (stress syndrome).
Usage and Nuance
This suffix is common in medical and everyday contexts when talking about health issues. It often appears in compound nouns describing specific conditions. Using ～症 implies a recognized medical or psychological condition rather than a casual complaint.
Common Collocations
- 花粉症 (かふんしょう): pollen allergy, very common in spring
- ストレス症 (すとれすしょう): stress-related syndrome
- うつ症状 (うつしょうじょう): depression symptoms (note: 症状 means symptoms, often paired with ～症)
Register and Politeness
Words with ～症 are generally neutral and used in both formal and informal contexts, especially in health-related conversations. When speaking with medical professionals, this term is appropriate and precise.
Learner Tips
A common mistake is confusing ～症 with 症状 (しょうじょう), which means 'symptoms.' ～症 refers to the disease or syndrome itself, while 症状 refers to the symptoms experienced. For example, 花粉症 is the disease, and 鼻水やくしゃみは花粉症の症状です (Runny nose and sneezing are symptoms of hay fever).
Understanding this distinction will help you use these terms accurately in conversation and writing.