鈍痛

1. Origins, structure, and basic meaning

• Structure: 鈍痛(どんつう) means a dull, aching pain rather than a sharp or stabbing sensation.
• Basic usage: It describes a dull lower-back pain remaining the day after a fall.
  • 転倒した翌日も腰に鈍痛が残っていた。

2. Common pitfalls and similar expressions

• Quality and intensity of pain
  • 激痛(げきつう) emphasizes very high pain intensity. 鈍痛 describes the quality of the sensation, so it does not by itself specify how mild the pain is.