Will the results achieved with mesotherapy be permanent, or will they require maintenance? How many mesotherapy treatments will I have to undergo in order to achieve the results I desire on my thighs? My thighs never tone or look shapely like my arms and

Unregulated medicine. Mesotherapy can be accomplished with a variety of techniques and products that are currently not regulated nor fully understood and many of the claims made cannot be substantiated.
Please . Please do not try mesotherapy. It is not fda approved, it is non-standardized, and will likely leave you with contour irregularities that you will have problems trying to get fixed. Review the credentials of the person offering you mesotherapy. I highly suspect that they are not a board-certified plastic surgeon.