Hemorrhoids are
enlargedEnlarged adenoids
Enlarged prostate blood vessels. It doesn't sound as though you have those. You probably have irritated skin, very
commonCommon cold in the anal area, especially where it's hot. Don't worry about the blood--that's just from rubbing too hard. I suggest that you wipe yourself very gently (using baby wipes, for instance), lubricate often with Vaseline or any moisturizer. Occasional use of 1% hydrocortisone (non-prescription) may help, or else a doctor can prescribe a prescription-strength version. Keep in mind that you will probably have to deal with this off and on for a long time, but you should be able to easily control it and be comfortable.
Take care.
Dr. Rockoff