Generalised tetanus is the most common type of tetanus and can be life threatening. You may have generalised tetanus for 3-21 days before you have any symptoms. The symptoms (once they appear) may include; jaw muscle spasms or stiffness (lockjaw), muscle stiffness or pain, which usually starts in your neck, shoulders and back, spasms or convulsions of your body which may be painful and can affect your breathing or digestion, fever, sweating. Spasms can last for 3 to 4 weeks.
Attribution: BUPA