Sagging and crepey skin on your upper underarms?

Do any of you older women have the sagging and crepey skin on your upper arms? It seems like my arms changed recently. I still have a lot of weight to lose but it frightens me to see how my arms are changing. I never seem to see other women with this problem, even women much older than me. I am so angry that I have to change the way I dress because I'm embarrassed to wear short sleeves now. I'm 64 and have lost over 30 pounds but have about 50 more to lose. If anyone has found a solution please let me know and if you have any photos please post. Thank you!