Hi Thanks for your interesting but challenging question. There are several skin-tightening methods (surgical and non- surgical) for the arm area. it is also important a detailed assessment of the area to be treated, your skin e.g. elasticity, muscle tone, smoking status, age, history of significant weight fluctuations etc One option could be surgical arm lift . This procedure involves removing excess skin but it is quite invasive and leaves a long scar. If the patient refuses to undergo to surgical lift, then I offer an alternative and less invasive option. My experience is with Bodytite in combination with Morpheus 8 (3 sessions 4 to 6 weeks apart ), Renuvion-J plasma (requires only 1 session) , Exilis 360 Ultra ( Radiofrequency and Ultrasound) that require 5 to 10 sessions usually once a week. I also combine the above procedures with Profhilo, collagen-stimulating dermal fillers ( e.g. Radiesse, Sculptra etc. ), collagen drink and skincare in indicated. It is important also aftercare program and lifestyle ( healthy diet and regular exercise, avoid direct sun exposure, good hydration) however the results are never guarantee because each patient is different and the results varies patient to patient. I would recommend to make an appointment with a surgeon expert in body contouring and skin tightening procedures for a medical assessment in order to make a bespoke treatment plan if indicated. Hope this helps, Best Wishes, Dr Giuseppe Fiore