Typical symptoms of Tetanus include:

Spasm of jaw muscles leading to difficulty in opening the mouth; trismus or lockjaw occurs in
50% of cases (Figure 2)
Spasm of facial muscles resulting in a sneering expression known as risus sardonicas (Figure
3)
Spasm of the back muscles cause opisthotonus in which the body becomes arched (Figure 4).
Reflex spasms whose presence and frequency determine outcome.