I've gotten something like that. It happens, not very often, when I shave and get an ingrown hair and the hair follicle gets infected. It feels like a little ball or something in there.

it could be a Sebaceous cyst.. I heard somewhere that 'excessive' testosterone or swollen hair follicles can cause them.. They're pretty much exactly what you're describing.

Try putting heat on it for a few minutes a day for a week or so, that can help it 'dissolve'.

If not then, yeah, probably get it checked.

Well the one I was speaking of went away. But at the base of alot of my hair follicles there's more of these little hard spots and I'm pretty sure they're from the hair follicles growing and expanding...I'll try not to be too TMI here so don't read if you don't want to know:

[NSFW] Where I had normal one hair follicles pre-T, now on my arms and legs and armpits and anywhere there is hair including my junk, there are multiple hairs coming out of the same follicle. I'm guessing this sudden increase in hair would cause this [/NSFW]

I had a problem like this once. It ended up being an inflamed sweat gland. When you're on T it makes your glands produce more sweat and sometimes they become blocked. The Dr. said the best thing to do is to steep a tea bag in hot water and apply for 10 mins a day. Otherwise it will eventually go away on its own.