noun
Literary or dramatic expression for tears of deep anguish, grief, or bitterness. Often used figuratively; the literal sense 'tears of blood' is rare.
See also: 血の涙 (ちのなみだ)
彼は血涙を流す思いでその決断を下した。
He made that decision with bitter tears.
血涙の思い
Even though I worked with tears of blood, life didn't get easier.