How to describe a man lying on the couch vomiting blood

He sat limply on the couch, coughing from time to time, and on the coffee table next to him and on the floor around him, scattered his used tissues, which were stained with scarlet blood. Suddenly, he coughed violently again, a metallic hollow sound. He straightened up and tried to moisten his throat with saliva, but a large mouthful of blood gushed out of his throat, and the goddess shot out like flowers; Immediately, like a dry tree, he fell on the couch, and everything fell silent.