腰痛

1. Origins, structure, and basic meaning

• Structure: 腰痛, read ようつう, means pain in the lower back.
• Basic usage: In 長時間のデスクワークで腰痛が悪化した。, long hours of desk work worsened the lower back pain.

2. Common pitfalls and similar expressions

• A noun naming pain
  • 腰痛が悪化した means the back pain worsened, and 腰痛を防ぐ means preventing it. It is a noun naming the pain itself.