Sagging on the back and inside of the upper arm usually results from fatty deposits and sagging skin. This happens because the skin and subcutaneous tissue in this area is weaker than in other places. Factors such as family predisposition, aging, weight gain, exposure to the sun, gravity usually increase the relaxation of the skin and subcutaneous tissue, causing sagging. Medical aesthetics and aesthetic surgery for sagging arms have many solutions. Of course, the only solution for skin sagging in a heavier degree is surgery. Surgery takes in average 1-3 hours.