After being scraped by plastic, it depends mainly on the depth and severity of the scraped wound to decide whether to get a tetanus shot. If the scratch is superficial, it mainly affects the epidermis and has not yet reached the dermis. This situation, regardless of the amount of bleeding, the wound is easily accessible to oxygen, usually do not need a tetanus shot. You can usually treat the wound with hydrogen peroxide, iodophor or other disinfectant solution and strictly disinfect it. However, if the wound is deeper, it is recommended that a tetanus shot be given. Because tetanus is anaerobic bacteria, if the wound is deep, tetanus bacteria can easily invade the wound, and in the absence of contact with oxygen, it is easy to grow in the wound and produce toxins. If it invades the muscle nerves, it is easy to have muscle twitching and spasms all over the body.