痛彻心扉也不能放声哭泣
[tòng chè xīn fēi yĕ bù néng fàng shēng kū qì]
Translating to 'Hurt so profoundly but can't weep aloud', this conveys immense inner pain expressed silently. Such users often suppress their emotions due to various reasons, preferring silent suffering over public display.