四し十じゅう肩かた

noun

frozen shoulder in one's 40s; shoulder pain around age 40

Commonly used to describe shoulder pain or stiffness that appears around the age of 40, often due to aging or overuse. Similar to 五十肩 (frozen shoulder in one's 50s).

• 四し十じゅう肩かたで腕うでが上あがらなくなった。