After being stabbed by a fish hook or stabbed by a fish thorn, you need to take a tetanus preventive injection, tetanus onset is due to tetanus bacillus infection, tetanus bacillus is anaerobic bacteria, suitable for survival in an oxygen-deficient environment, wounds that appear deep and narrow, are easy to form a hypoxic environment inside, resulting in the breeding of tetanus bacillus infection of the human body. A deep and narrow wound can be formed by a fish hook or a fish sting, which should not only be treated with a thorough local debridement, but also with a tetanus shot. When injecting tetanus prophylaxis, a skin test should be conducted before the injection, and for patients with positive skin tests, tetanus prophylaxis should also be administered through multiple desensitization injections.