Anal itch, is it pinworms, hemmoroids?

[DonotidentifyDoe]

I may have posted in the wrong section, but I can't find anywhere more fitting. I am 14 years of age and have an extreme itching sensation inside the anus, and have been unable to identify the cause. I have suspected pinworms, but have seen no worms in my stool. I actually have a theory that goes back to a couple of months ago. I went on a five mile run, and stopped at a Jersey Giants to pick up a sub. When I got home, I got diarrhea, and it lasted for about three days. It began to cause a burning sensation around the anus, even after thorough cleaning, and I developed a minor itch for about a week, which disappeared,a now about two months later I have the same issue, could this have caused a hemorrhoid or some inflammation in my colon? I don't know if diet plays a role, I could eat better, but I don't eat too bad. I quit drinking soda about four months ago and started drinking only water. and occasional Powerades/Gatorade, but I'm not out of shape. I run miles during the weekend, have six pack abs, and weight only 134 pounds at a height of 5 8. I really need help, this problem has become so severe that it itself has actually started causes depression as well as anxiety. I am looking into talking to a doctor about this problem, but would like to see what other medical professionals have to say before the embarrassment of having to go to the doctor with my parents because of an itchy anus. Any help is greatly appreciated. P.S the itching is much more severe after bowel movements

[TMinDC]

Sounds more like hemorrhoids (worms are more common among children, but not as common among teenagers and adults).  You shouldn't be embarrassed by the itching (your parents have probably had hemorrhoids at some time in their lives as well - they're very common).  Hemorrhoids are caused by straining when you go to the bathroom (either constipation or excessive diarrhea).  Most go away on their own after a few weeks, so you probably have nothing to worry about.  Eat lots of fiber (fruits, vegetables) and drink lots of water to help you on the toilet.  You can also help the them heal faster by taking a sitz bath instead of toilet paper (fill the tub with a few inches of warm water, squat down, and wash and soak your butt). Be sure not to scratch, as you can make the hemorrhoids bleed that way.  You should be fine in a few weeks.  If not, then you should see a doctor.