Which procedure is most effective in removing excess fat from the upper arm area?

This will depend on the ration of fat and skin in the area of concern. If skin quality is good and the problem is mostly fat, then liposuction with or without an energy device would be the best option. If the area in question is mostly skin with some subcutaneous fat, then I would favor a more invasive energy device (such as BodyTite or AccuTite) or formal arm lift procedure. This truly takes an in person physical exam to determine which is best.

If your concern is excess fat then liposuction is the best way to address areas that are resistant to diet and exercise. If you also have loose skin then the degree of laxity will determine the best approach for you. Visit with a board certified plastic surgeon near you to learn more.