Under normal circumstances, if there is an allergy to tetanus, a skin test is not required. If tetanus vaccination is indeed necessary, human immunoglobulin can be injected, and this does not require a skin test. 250 units can be injected directly. Additionally, tetanus antitoxin desensitization injections can be used. The so-called desensitization injection involves diluting 1500 units of tetanus antitoxin into doses of 0.1 ml, 0.2 ml, 0.3 ml, and 0.4 ml, totaling 1 ml, and administering it in four doses, each 20 minutes apart. After the injections are completed, an observation period of 30 minutes is required to ensure there are no adverse reactions before the patient can leave.