針唔㓤到肉唔知痛 [针－－－－－－－]

Jyutping zam1 m4 㓤 dou3 juk6 m4 zi1 tung3
Pinyin zhēn wú qià dào ròu wú zhī tòng

Definitions (Wiktionary)
  1. proverb, Cantonese
    to not understand or the dilemma or difficulties (of something) until one has to face or deal with it