Small lump on head of penis? Not sure what it could be.

So I noticed a small lump on the edge of my penis head this week. It's hard to notice, but visible in the light as the you can see the reflection of the skin. It doesn't hurt and I don't remember hitting it against anything. I was with a new partner a week before I noticed this? Could this be an STI? Thanks!!

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Those look like pearly white penile papules so you don’t need to worry