後遺症

1. Origins, structure, and basic meaning

• Structure: 後遺症 is read as こういしょう and is a noun for aftereffects or sequelae that remain after an illness or accident.
• Basic usage: Aftereffects of an accident appear in 事故の後遺症, while those of an infection appear in 感染症の後遺症.

2. Common pitfalls and similar expressions

• Effects remaining after the cause
  • It identifies a problem continuing after the acute illness or accident, rather than only a symptom during the event itself.
• Difference from 合併症
  • Unlike another condition arising alongside an illness, this term focuses on effects persisting after the original illness or accident.