Yeah it started for me around 18 or so. I've put it off for 18 years now. I'm sure it was a mixture of drinking, dehydration, excessive running, stress and poor diet. For a little while I couldn't figure out if it was hemmroids from stress/riding a motorcycle and other strains but when I read more into the damages that can be done from long distance running all the time, I think that and diet caused most of it. Excessive alcohol use following that up didn't help much. I've learned that bad choices are my Pokemon, I apparently just have to catch them all before I learn anything