Swelling pimple or cyst? Hormonal?

Patient: I have had a pimple or cyst for 7 or 8 months just below my jawline on the right side of my neck. It swells when I’m about to start my period and I think maybe I can finally get it to pop… it never does. Is this anything you have seen before and what is your advise?Thank you for any help you can lend.

Symptoms: Swelling, redness

Doctor: