ok im only 13 so obviosaly I dont no but I have the same thing mine is under me left ear my dad is a fireman and he said I chould get it checked out it kinda scares me cuz people get cancer from lumps on their necks but I dont reallyno haha so...Ya

i have the same thing too, on the left side of my neck.

Anyone have any idea as to what this is/could be?

I have one too and looking at other sites have told me that if it is visable it could be a linf node (not sure on the spelling) but if it isnt visable you should get it checked by a doctor.

Hope i helped.

If you have one you had a recent flu or cold never mind it will go away, if is painful probably is an infection somewhere in your body if is not painful and do not goes away, you need a biopsy yesterday. You need to see your doctor now....

I'm the user ChoCho who posted earlier in this topic when I had the same problem, I did end up going to the doctor and found out it was a boil, and the doctor lanced it (cut it open) and drained it and prescribed me some antibiotics. It was VERY painful until after it was lanced and drained, but afterwards I felt almost completely fine.
I suggest going to a doctor, even if you're not sure if it's really serious. It could end up becoming more serious and it actually can be extremely painful sometimes.
Apparently the cause of this was from medication I was on that weakened my immune system, and when your immune system is weakened you are more likely to get boils.

Anyhow, I hope this helps someone out.

send the pus for culture, to r/o the possibility of MRSA.