I have one under my armpit and one in between my legs, near my crotch area. It dosn't hurt unless I mess with it, bur it just looks really weird and I cant figure out what it could be.
Granted, its not the best picture. However, you can see how its raised off my skin. Almost like a nipple or something. The one between my legs is exactly the same. Its kind of saucer shaped, but its rasied off my skin, unlike a pimple that is flat on the skin.
This drawing I did shows what I'm trying to say. The left version is what it looks like. The right side is what a typical pimple like thing would be and is not what I have.
Based on your drawing (picture is too blurry) it looks like a skin tag. Don't know much about them, but I think they are benign. Google it.
Edit: Also, and I can't vouch for it, but I've seen people claim Seabuckthorn oil got rid of their skin tags. Blue Sage Naturals I think is the site that had said that. Seems odd as SBT Oil is usually for killing bacteria, fungi, parasites.