noun
sour face; wry face
Describes a facial expression showing displeasure, bitterness, or discomfort, often in reaction to something unpleasant.
彼は苦り顔でその知らせを聞いた。
He listened to the news with a sour face.
まずい薬を飲んで、子供は苦り顔をした。
The child made a wry face after taking the bad-tasting medicine.