this past few weeks i experience frequent pain on my left eyebrow, this occurs every afternoon and takes hours before the pain is gone.i tried massaging it and i felt a lump,like it is swollen or something. it is a hard lump and it is very painful when pressure is put on it. I am 27 years of age, what might be the cause of this? lately the pain becomes more and more painful and its hard for me to do things i normally do, once the pain occur i have no choice but to sleep and take a rest