White Pimple On Oranda Goldfish's Wen???

[Samantha Levine]

I'm noticing what appears to be a white looking pimple on my oranda's head. (This is not the same oranda as my other thread in this forum. But go check that one out! A girl needs some help haha).
My water parameters: ammonia and nitrites 0, nitrates 15, and pH 6.9. This white spot has seemed to appear almost over night. I read that it could be wen growth, but I'm having swim bladder problems with another oranda and now I'm getting spooked that it may be a bigger issue. I posted some pics down below! Please let me know what you all think!

 

[Samantha Levine]

Update - The white pimple easily wiped away with a Q-tip. I'm hoping this is just wen growth.