Hi, I have a hard white bump on my face, close to my upper lip. I thought it was an under the skin pimple in the beginning, but now know it wasn't. it has grown in size, a bump is visible to the eye - especially when I smile. It does not hurt, it does not move, it has no Colorado/is under the skin, but it has grown in size to about 5mm in diameter. How can I treat this? Thank you.