My body has always been very thin, but I only had fat on my arms. I wanted skinny, bony arms, so I went around for consultations.
I went everywhere from cheap hospitals to expensive places, but they said I didn't have much fat, so since I was only going to refine the lines, I chose a place with a relatively low price range and no posts about side effects.
I'm satisfied with the result. Honestly, I didn't get bony arms, but I think that's because I need to lose more weight to begin with.
They removed all the fat they could from my arms, and they definitely got thinner. They look like my arms when I've lost about 3 kg of body weight. There is really a tiny bit of uneven hardness on the right side, but it has loosened a lot, and I'm living very well without sensory abnormalities.
But even if you're thin, if you have arm fat, you need to diet at the same time to get bony arms. Otherwise, it only refines the line.