M.B.
I've had them where you can feel a lump inside.... I think that is maybe a blood clot in it?
Yep...
"External hemorrhoids
External hemorrhoids can get irritated and clot under the skin, causing a hard painful lump. This is called a thrombosed, or clotted, hemorrhoid."
http://www.webmd.com/a-to-z-guides/hemorrhoids-topic-over...
Good old Dr. Google! ;)