2 strange white spots on shaft?

Hello, I've had these two slightly raised spots on my shaft for around 6 months. My local doctor looked at it for a couple of seconds before deciding they weren't an STD (and therefore not important), and I've since had a test that proved he was right. What are they though? Something to do with ingrown hairs? They have really affected my confidence these past few months...

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Please anyone have any ideas about this???