what is the feeling of locked jaw?
<answer> The feeling of lock jaw is first, you'll feel a headache and a muscular stiffness in the jaw. It will be difficult to open and close your mouth. <context> First, you'll feel a headache and a muscular stiffness in the jaw. It will be difficult to open and close your mouth. This is why the condition is commonly known as lockjaw. Symptoms usually set in about eight days after infection, although the onset has been known to range from three days to three weeks.