Well quite a while back i nipped my lip with a clip I got in school. There is now a small purple/red lump on my lip, it doesnt hurt and bleed etc.

I tryed about 3 times to make it go away by poking it with a needle but nothing really happed only slight bleed, now its stay there like a scar on my lip and wont heal, I really dont know what it is, its about 4mm in diameter.

Please help me, does anyone know what it is?
Should i go to the doctor?

Please help!