I had a few treatments a while back for something similar to what you have. Yep, rubber band snaps! Usually it takes a couple/few times to REALLY see results. It's supposed to stimulate the collagen growth in the area being treated.
At the time I had mine done, it was $150.00 for 5 zaps (he gave me more than that though at no add'l charge). If you get a good dr. maybe he'll give you a few extra too. Price has probably gone up since then......