What is the best way to address the loose skin of my upper arms? (Photo)

From your submitted photos there is an improvement from your before photos. If you are interested in a revision but not sure if you are a candidate you may wish to visit with another board certified plastic surgeon for a second opinion. Depending on the degree of skin laxity you may be able to consider BodyTite or Morpheus8 for improvement. If the skin elasticity is poor, then excision would give the best outcome.

Thank you for sharing your concerns about the postoperative results of your arm lift. From your description, it appears that your brachioplasty has yielded significant improvements. Your scars are well-concealed, and there's a noticeable reduction in arm size.
The residual, mild excess skin you mentioned could be attributed to genetics and your weight loss history. Another surgical intervention might offer tighter skin by making a new incision near the current scar. However, additional surgeries might produce diminishing returns, as less skin can be removed each time.
In conclusion, while your current outcome is commendable, if you're considering further enhancement, another brachioplasty could be discussed with your surgeon.
I hope this provides clarity on addressing the residual skin concerns after your arm lift.
Sincerely,
Dr. Katzen