Whether or not you need tetanus for a rusty iron cut that bleeds from the epidermis depends on the depth of the wound. If it is a superficial abrasion, then tetanus may not be needed, but if it is a deeper wound, then tetanus is needed. Bleeding from rusty iron cuts, if only superficial skin is scratched or shallow abrasions, then tetanus is not required, this is due to tetanus is caused by Clostridium tetani from the human body broken skin, mucous membranes infected human body, in the oxygen-deficient environment of a large number of reproduction and toxins resulting in the disease, superficial wounds in contact with the air, generally will not cause Clostridium tetani in the wound localization of reproduction. However, if a rusty iron cut with bleeding skin is deeper, it is easy to create a local anaerobic environment where Clostridium tetani is easy to reproduce, so it is necessary to take tetanus shots. If a rusty iron cut bleeds from the skin, follow your doctor’s instructions.