Dear nancypv, From what you describe this could very well be a cyst however without having it checked out it is impossible to say for sure. It is always a good idea to have a new lump evaluated.
the bumps on the areola (the dark area) are most likely nothing at all to worry about. You didn't state your age; but most tender lumps are not cancer. However, no one can tell you what a lump is online. You need to have it checked by your doctor.
i did not have my age in there. i am 31 years old.