Sentence:  He moved convulsively, and as he did so, said, "I'll be quiet, Doctor. Tell them to take off the strait waistcoat. I have had a terrible dream, and it has left me so weak that I cannot move. What's wrong with my face? It feels all swollen, and it <WSD>smarts</WSD> dreadfully." 
Meaning of the word marked with <WSD> tags:  To hurt or sting.