thorn in the flesh

A constant or persistent cause of annoyance, frustration, or trouble. My little brother is such a thorn in the flesh—he always wants to do stuff with me, especially when I'm trying to hang out with my friends.

Common Names:

Name	Pronounced	Usage
Kjetil	-	Norwegian
Mihaela	mee-hah-YE-lah (Romanian), mee-HAH-el-ah (Croatian)	Romanian, Slovene, Croatian, Macedonian
Hess	[hes]
Arkaitz	-	Basque
Darayavahush	-	Ancient Persian
Ainslie	AYNZ-lee	English (Rare)