注ちゅう射しゃ痕こん

noun

injection scar; track mark

Refers to a visible mark or scar left on the skin from an injection, often associated with intravenous drug use but also used in medical contexts.

• 彼かれの腕うでには古ふるい注ちゅう射しゃ痕こんがいくつも残のこっている。

  Several old injection scars remain on his arm.