I'm a plumber and i accidentally stabbed myself with screw its a very mild cut and didn't bleed at all i had my tetanus shot 4 years ago should i be worried about tetanus im not sure if the screw was rusty or not?

A booster within 5 years should protect you well from this exposure. It may be a reminder to consider asking your primary care doc to give you another booster if you go in for another issue in the next year or so.

Typically, if your last tetanus vaccine was within the past 5 years, you should not need another one now. If you are very concerned, have a doctor evaluate your injury and ask if you need a booster based on your particular medical needs and immune status.