Im a 24 year old female and I have a golf ball sized lump on the right side of my neck/ shoulder?

how long have you had it? because i broke my collarbone earlier this year and i have a golf ball ish sized lump on my left collarbone, and at the hospital they said it will get a little smaller, but the bump will be there forever still. so you could have broken your collarbone when you were very little. it is common to break when you are young. but if you have just gotten it now, then thats a little weird...