You can access information on www.wikipedia.org about these cysts.
Sebaceous cysts are NOT serious, but more annoying. I had one myself; neck/shoulder area.
Have the physician assess the site and see what he/she thinks, then you will know for certain what it is.
Keep in mind this is just my GUESS.
What is a sebaceous cyst? Is it serious? If it's still swollen on Monday, I am going to see the doctor. It's painful just to touch.
Thanks for the info
I would have your physician assess the site. Sounds like a nasty whitehead pimple or maybe a small sebaceous cyst.
Do not squeeze it, pick at it, etc. Keep it clean with plain water daily.