C2 noun /ˌvælɪˌtjuːdɪˈnɛəriən/
valetudinarian
健康気にしすぎな人
Meaning
A person who is unduly anxious about their health or constantly concerned with minor ailments.
Example
He was regarded as a valetudinarian, always worrying about his health.
彼は健康気にしすぎな人として知られていた。