Patients who are injured without tetanus vaccination may have no obvious symptoms, but they may also have symptoms such as muscle weakness, muscle tension and breathing difficulties. 1. Muscle weakness: If patients are infected with tetanus, they may present symptoms such as muscle weakness in the early stage, such as weakness of limbs, headache, dizziness, and weakness in chewing. 2. Muscle tension: usually the most typical symptom of tetanus infection is muscle tension, usually the back, abdomen, limbs, neck and other locations may show abnormal symptoms such as muscle spasm. 3. Difficulty in breathing: patients infected with tetanus may have difficulty in breathing, apnea and other symptoms, or the body is twisted into a bow, which may be life-threatening when the situation is serious. It is recommended that patients with deep and fine wounds caused by nails and other objects breaking the skin and muscles should go to the hospital in time for debridement and tetanus vaccination to avoid delaying their condition.