I'm on the TECNU train. Used to not be allergic to it, then that changed. Not sure how but it did. I've had it soo bad, I've gotten steroid shots in the butt. They didn't work. I have learned that it lasts on me exactly 2 weeks on my skin. Here is a fact commonly dismissed as a myth. I know it to be true because I have lived it. Outbreaks pop up at different times in different areas of the body due to thicker skin in some areas. Once the oils penetrate the skin and the body reacts, they are rendered harmless. Just because you scratched it, broke open the scab and got it a day later near that spot does not mean you helped spread it. It means the urishol oils from the plant were already on your skin, just hadn't penetrated yet. I will scratch open the sore in the shower then pee on it. No joke, it definitely helps get rid of any itching. my fights have turned into mind over matter, I know that at exactly the two week mark, mine dries up overnight and I'm good.