Below my eyebrow but above the eye I have a hard lump under the skin like 1-2cm in size. I suffer from really bad acne on my shoulders/back and occasionally my face, and I've had this lump for about 2 weeks now. Thing is, it's under the skin and isn't really red in colour, if anything maybe yellowy/more skin coloured than red. 

It hurt when it first appeared, when I raised my eyebrow I could feel it there, sort of tugging on the skin around it, but now I can't feel it at all (until I touch it). 

Should I be worried about this? How much longer should I wait for it to go away, and is there anything I can try to speed that up?