Tetanus, also known as
lockjaw, is an
infection characterized by
muscle spasms. In the most common type the spasms begin in the jaw and then progress to the rest of the body. These spasms usually last a few minutes each time and occur frequently for three to four weeks. Spasms may be so severe that
bone fractures may occur. Other symptoms may include
fever,
sweating,
headache,
trouble swallowing,
high blood pressure, and a
fast heart rate. Onset of symptoms is typically three to twenty-one days following infection. It may take months to recover. About 10% of those infected die.