I am 59 and my arms look like I'm 82. Will microdermabrasion or any other technique work in strengthening my skin?

My doctor just says its thin skin. Sun damaged skin. But this became a problem overnight. I had been under extreme stress for about a year and lost about 1/3 of my hair. Once the stress subsided and my hair started growing back, I started having the bruising problems. Will microdermabrasion or any other technique work in strengthening my skin? The problem is only on my lower arms.