I've had a small fatty lump on my jaw line for years, well over 25 years. Doctor said it's fine, offered to remove it but I declined as I couldn't see it, didn't want to go through a procedure unnecessarily etc.
I've had one removed from my back and one from my arm as both were getting irritated by clothing.
Neither ever hurt but the one in my jaw hurts really badly today and seems to be slightly bigger.
I know I need to see a doctor but until I get an appointment, some reassurance from someone who has had something similar and its nothing scary would be good please.