I'm somewhat comforted that there are other people with this problem! I get one in my left nostril, as well. Mine might be a little higher up than some of you are describing & honestly, I've never felt the need to root around in there to find the exact location (if I even could). Sometimes when it's bothering me (the outside of my nose will become sore to the touch), I use a tissue to clean it out, blow my nose, etc. Then it's fine for a while. There is usually a tiny bit of dried blood. This has been going on for at least a year or more. I've always shrugged it off & figured it was allergy related. Some days, like today, it doesn't feel like it's there. Very weird!!!