Di,
You are correct, people sell Botox by cc, which is a measure of volume, or by unit, which is a measure of total Botox. Additionally, they may sell it by areas, which tells you nothing about the volume or the total Botox. It is best to always know how many units you are receiving. This way, the next time you have a Botox treatment, you will know if you need more or less in specific areas. Most careful injectors keep tract of how many units they inject in each area and mark this in their chart. If they are unable to tell you how many units they are injecting, then they probably do not know what they are doing.
I hope this is helpful.



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