2 or 3 places. Although this Kabelline liposuction needle has a good slimming effect, it can't be used too much at a time. I asked the doctor that it is not acceptable to use more than 16ml at a time. To be on the safe side, I didn't use too much. I just go every other week. The thigh that hasn't lost weight after running for several years is now thin, haha.