Bump On Lip Piercing There Is A White Bump Around The Outside Of My Lip Piercing?

There is a white bump around the outside of my lip piercing? - bump on lip piercing

I came three weeks ago tomorrow and beautiful, but now there is a hard white ball under it, I do not know his Crusties built, because I feel it in my mouth when I touch it too, but it does not work badly

What is it?

Only experience, please