Arm Tuck or Arm Lift for loose skin and bat wings?

Thank you for your question regarding “arm tuck or arm lift”.
Your question is almost impossible to answer without pictures. However, I will try to answer your question about “arm lift”.
I would like to explain “arm lifts”, arm tucks, and arm reductions. When we use the term “breast lift”, mostly breast skin and not much breast fat is removed and thus, the breast is lifted. The shape of the breast changes, but size of the breast stays the same. When we use the term “arm lift”, the arm skin and fat are removed. Usually, more arm fat than arm skin is removed. Thus, the arm is lifted and reduced. The shape and size of the arm becomes smaller. However, the arm is more reduced than lifted. Therefore, an arm lift is more of an arm reduction than an arm lift. Of the hundreds of arm lifts I have performed, the arms are not just lifted, the arms are also significantly reduced.
Since you mentioned you have “bat wings”, without pictures, to me this suggests, you have excess arm fat. You also stated you have loose arm skin. Therefore, you have excess arm skin and fat. Thus, I would suggest a brachioplasty or arm lift.
Good luck with your quest for skinnier arms.
If you have any questions, please do not hesitate to contact my office.
Sincerely, Dr. Katzen

Arm lift incisions vary in terms of the amount of muscle and skin flaccidity.  You may be a good candidate for an arm lift in order to plicate the muscle and soft tissue layer of the arm. Best, Dr. Karamanoukian 

"Bat wings" vary greatly from patient to patient. In general the excess skin and underlying tissues need to be excised. The larger the wings, the longer the incisions will need to be for optimal results.