Small white bump on penis head rim

Hello, I have this small white raised bump on my penis head around the rim of the penis. I noticed it a week ago, after taking a shower and thought nothing of it. But now after a week it is still here, and I am getting worried. It did not get bigger or smaller. I have gotten tested 2 months ago and everything was clean. I did feel a little pain in my penis yesterday but it lasted for 2 seconds and went away and I don't know if I am getting anxious but I thought it was from the bumps. I was laying down and playing xbox. I'm 30 and not sexually active but I masturbate a lot, and also I have been going to massage parlors where they end up giving me a hj. Not sure if its related but just putting it out there. Please help. Thank you.

image

image

Hello. Just wondering if anyone had a similar experience and might happen to know what it “might” be? Thank you.