不眠症

1. Origins, structure, and basic meaning

• Structure: 不眠症(ふみんしょう) is a noun for insomnia, a continuing difficulty with falling asleep or staying asleep.
• Basic usage: Continuing symptoms appear in 不眠症が続く, while a connection with another factor appears in 不眠症と生活習慣の関係.

2. Common pitfalls and similar expressions

• Continuing sleep difficulty
  • It suits a continuing sleep problem rather than a single occasion of sleeping poorly.
• Connecting expressions
  • Use 不眠症が続く for the condition continuing and 不眠症と生活習慣の関係 for a relationship between two factors.