什么痛也比不上心痛
[shén me tòng yĕ bĭ bù shàng xīn tòng]
Translated as 'No Pain Compares to Heartache', this conveys that among all types of pain (such as physical injuries or losses), emotional hurt feels the deepest, most unbearable. It shows an emphasis on the depth and gravity of mental anguish.