"ailment" in Chinese (Simplified)
疾病（多指小病）- 疾患
Definition
一种通常不太严重的小病或健康问题。
Usage Notes (Chinese (Simplified))
比“病”更正式，多用于医学或书面语境，强调较轻或慢性的健康问题，不指重病。
Examples
She saw a doctor about her ailment.
她因为自己的**疾病**去看了医生。
A cough is a common ailment in winter.
咳嗽是冬季常见的**小病**。
He missed school due to a minor ailment.
他因为轻微的**疾病**没去上学。
She deals with several chronic ailments, but manages them well.
她有几种慢性**疾病**，但处理得很好。
That old ailment always flares up when the weather changes.
那种老**毛病**天气一变就发作。
It's just a minor ailment—nothing to worry about.
只是小小的**毛病**，不用担心。