Tetanus can be fatal if not treated promptly. When infected with tetanus, early symptoms primarily include dizziness, headache, fatigue, decreased appetite, weak chewing, and sore jaw muscles, some may also exhibit increased reflexes or muscle rigidity. As the condition worsens, some patients show typical tetanus symptoms such as lockjaw, difficulty opening the mouth, risus sardonicus, opisthotonos, and stiff neck. As the condition further deteriorates, it can lead to difficulty breathing, or even respiratory arrest, and cardiac arrest. If not promptly rescued, the patient can die.