There are three popular non-surgical contouring options:
Coolsculpting – this treatment uses the process of cryolipolysis, otherwise known as fat freezing.  It requires multiple treatment sessions and results are seen after 4-6 months. There have been issues with tissues becoming lumpy and even sites that paradoxically grow more fat.
Radio Frequency (RF) treatments are usually effective in temporarily tightening the skin.  RF treatments show good initial results but tend not to be durable after a year or two.
Kybella – deoxycholic acid which is an injectable series of treatments that is FDA approved for the treatment of the “double chin” but has found a number of “off-label” uses such as the bra roll, area around the belly button, knees, and arms.  There is some discomfort with the injections and a considerable amount of swelling may be present for up to two weeks after treatment. To achieve optimal results, it requires a series of three treatments.