Tetanus is a specific infectious disease, most cases of which present as muscle tension and rigidity. Specific symptoms include difficulty opening the mouth, a sardonic smile, stiff neck, and opisthotonus. In severe cases, difficulties in breathing or even cessation of breathing can occur, and in critical cases, the heartbeat may also stop. Once tetanus occurs, it is crucial to seek active treatment at a hospital. With proper and systematic treatment provided by hospitals, most patients can be cured. Therefore, tetanus is a curable infectious disease.