The incubation period of tetanus varies in length, usually 7~8 days, and its incubation period is closely related to the prognosis. Tetanus is caused by Clostridium tetani reproducing in an anoxic environment and producing a large amount of exotoxins such as spasmodic toxin. Its bacterium and exotoxin do not cause obvious pathological changes locally, so it has a certain incubation period. The incubation period of tetanus is generally 7~8 days, and some of them can be shorter, only 24 hours; some of them can be very long, up to several months or years, etc. The shorter the incubation period, the better the prognosis. The shorter the incubation period, the worse the prognosis. Usually 90% of the patients develop the disease within 2 weeks after the injury, and its precursor symptoms include generalized weakness, dizziness, and weakness in chewing. If you feel unwell, it is recommended that you seek prompt medical attention.