I gashed my forehead really good in the summer of 2013. It left a scab in the shape of a Nike Symbol, about an inch to inch and half long. A friend of mine told me to pee on the end of my finger each morning (fresh urine in morning is best, so I heard), and dab it on the scab. I thought this would leave a scar there for LIFE. It's now a year later and you can't even tell anything is there. I can even show you before pictures as to how bad it was too.