 [ Symptoms ] urgent please help friend fell on previously stress fractured shin  the stress fracture is on her shin but she knows its not broken and not refractured because it felt different the pain is alll the way up her lower leg and it hurts to touch it turn her leg put pressure on it or tense the muscle there is no bruising bones protruding from the skin redness or swelling please help [ Disease ] you need to get another tetanus shot yes the vaccine lasts ten years but not to the day or month to be safe get another one and you will be good for ten more years the vaccine is 100 effective and tetanus the disease is just about 100 fatal so it pays to be safe