How long does tetanus skin test take?

Tetanus vaccine should be injected after severe wound. Before tetanus injection, skin test should be done. The time of skin test is about 20~30 minutes. If there is no obvious symptom after half an hour, it means that there is no allergy phenomenon. If skin test site shows redness, itching or pain and papules, this situation indicates that the patient is allergic to tetanus antivirus. At this time, injection cannot be done. It is best to inject tetanus immunoglobulin, but desensitization injections can also be performed.