Your description of what happened is consistent with a possible mild internal separation. In the majority of patients treated there are usually multiple internal sutures this should not be a long term problem.
I would definitely make a follow up appointment with your plastic surgeon.
1)standard brachioplasty- removes skin, fat with an incision from armpit to near elbow
2) mini brachioplasty - usually performed with liposuction and skin resected only near armpit with scar limited to armpit area.
3) minimal scar brachioplasty- liposuction proceeded by Radio Frequency (RF) (Thermage an example)
These are the options I give my patients asked on their desires and physical exam.
Make a appointment with a reputable, expirenced board certified plastic surgeon.
R. A. Hardesty, MD, FACS
Diplomate and Certified by the American Board of Plastic Surgery
Awardee: Real Self Top 100
4646 Brockton Ave
Riverside, Ca 92506