What can I do to tighten the skin on my arms? Will J-Plasma work? (photos)

Unfortunately, most of the current, relatively expensive device technologies touted for treating lax skin have proven disappointing--more "bells and whistles" and device manufacturer marketing hype than true benefits. The use of injectable biostimulatory "skin boosters" is one simple and relatively inexpensive approach that has been used for laxity in both the upper arms and thighs and for  crepey, crinkly skin of the lower face. Skin booster, such as "Restylane Skin Boosters,"  Hydromax & Juvederm Volite, injected superficially in a variety of patterns (fanning, microdroplet grid, cross-hatching) work by hydrating the overlying skin and increasing skin turgor, which translates into tightening and smoothing of the overlying skin, and stimulating new, native collagen and elastic fiber production. Typically a series of two to four treatment session that engender little to no significant downtime  spaced at monthly intervals is necessary to achieve optimal results. I use all three of the aforementioned products in my Israel satellite facility, where a far greater number of regulatory agency approved fillers are currently available in the States. In my NY office, I rely upon Restylane Silk for this purpose. Before jumping to some "next big thing" to come along device, you would be wise to seek consultation with a board certified aesthetic physician. Best of luck. 

Great question. I believe J-plasma would be a great option for you to tighten your arms. I love doing the procedure and the results have been amazing overall.

J-Plasma, ThermiTight, and BodyTite are all suitable options to tighten loose arm skin without surgery. My preference is ThermiTight. More important is that you find a physician that has experience treating the arms for an in-person consultation and evaluation. Best wishes.