It's very probably a hemorrhoid. If it's uncomfortable (and it probably is, to some extent) see a doctor and as for something called Peranex HC. It'll get rid of it quickly.
For the moment, do some sitz baths, and don't sit for too long a period of time.
Wow I have the samething and Im 48.
i have the samething small pea sized ball under the skin it doesnt hurt at all its hard and worring me ???