Headache
Headaches are caused by a variety of factors, such as cerebral artery dilation, trauma, muscle contractions, or drug reaction, among others. Headaches are quite common and it can be difficult to narrow down the cause yourself. If you have recently been in a situation that exposed you to tetanus, it might be the cause of your headache [3].
People who have tetanus infections often experience headaches. This is also one of the earliest signs of an infection. The headaches seen in people with tetanus may be due to muscle contractions in the head.