Is he dehydrated?
Signs include sunken eyes, loose skin, sometimes it looks like a vein (or veiny), brownish urine or non at all. With veileds excess build up of salt around the nasal passage with sub-adults or adults.
A picture would help. I am a little confused with what you ment by golf ball.
My female after her first clutch had what appeared to be a vein running in that general area. As I hydrated her well over the next couple of days with extra mistings, a shower, and longer dripper runs the vein receded into little bumps almost before dissappearing completely. The bump could be a physical sign of dehydration.
Possibility that it could be some sort of parasitic worm (seems unlikely though) or other wise a picture will help with that determination. You will know whether or not your chameleon is dehydrated or not to rule that out. If not make sure you take the best quality picture of the spot as you can, good light and maybe off angled to see the raised spot.
. lol . but he's like a kid to me... so . i dunno... i think i may just be worrying . i dont have a digi camera... so it is hard... i just have a webcam... which is crap for pictures... i dunno .... u tell me what i should do .... it is literally . right by the back legs... 
. whatever i can do for my son is good for me...
. Not to get you overly worried, I've done novice necropies where the intestion had a "lump smaller than a golfball" that was partially digested food that had turned into a solid blockage. Needless to say, it killed the female panther. The keeper hadn't noticed anything right up until she began crawling around the bottom of her enclosure. Sub-optimal hydration was likey a contributer 
