Doing skin test for tetanus shot will not cause harm to the body. Doing skin test before tetanus shot is mainly to clarify whether there will be an allergic reaction to the tetanus shot vaccine, suggesting that it is only a slight localized small wounds, which will not cause obvious harm to the body. If the result of the skin test is negative, it means that you are not allergic to the tetanus vaccine, and you can go ahead with the tetanus vaccination. If the test result is positive, tetanus vaccination is not allowed to avoid serious allergy. After receiving tetanus vaccination, individuals may have adverse reactions, such as fever and red rash, etc. However, most of the adverse reactions are mild and will gradually resolve on their own. If the adverse reaction is more obvious after the tetanus shot, you need to consult a doctor in time.