Tetanus skin test solution is prepared at a concentration of 150 units/mL as follows. Draw 1 mL of solution containing 1500 units of tetanus antitoxin, add 0.9 mL of saline to dilute to 1 mL of solution, and this 1 mL of solution containing 150 units of tetanus antitoxin is the tetanus skin test solution. Tetanus antitoxin is the plasma obtained after immunization with tetanus toxoid, therefore tetanus antitoxin contains heterogeneous protein. This protein is antigenic to the body, and direct injection into the body may cause the body to experience rejection reactions such as hives and anaphylaxis. Therefore, a skin test should be done first. It is recommended to go to the hospital immediately for treatment of any wounds, and you should have a good routine and pay attention to protection.