expression
one illness, long life
A yojijukugo proverb meaning that having a chronic illness makes one more health-conscious, leading to a longer life. Often used to encourage someone with a minor ailment.
「一病息災」という言葉もあるから、あまり気にしすぎないで。
There's also the saying 'one illness, long life,' so don't worry too much.
A yojijukugo derived from the idea that a person with one chronic illness tends to take better care of their health and thus lives longer. The exact origin is uncertain.