伤脑筋

Traditional form:

傷腦筋

Pinyin (reading):

shāngnǎojīn

Definitions:

• to be a real headache
• to find sth a real headache
• to beat one's brains

Characters:

• 伤 - to injure, to harm; wound, injury; to fall ill
• 脑 - brain
• 筋 - muscles; tendons

Traditional characters:

• 傷 - to injure, to harm; wound, injury; to fall ill
• 腦 - brain
• 筋 - muscles; tendons