What are these small bumps on my arm?

It could be yeast.

Sounds like keratosis pilaris.
It’s a common and harmless skin condition that kind of looks like “permanent” goosebumps and is most common on the backs of the upper arms and backs of the thighs, but it can appear other places on the body, including the face.

There isn’t a “cure” but lotions containing AHAs are good for reducing the appearance. I like Eucerin Intensive Repair.

It’s hard for us to tell without actually seeing them. You should see a dermatologist.

Do please upload a photo! Try using, Imgur.com

I don’t know but I want to say you’re not alone so don’t worry about it.

I second @DigitalBlue‘s answer. It’s very, very common.

Thanks guys you were a big help.

What was it?

Digitalblue’s