Is it normal to loose energy on 1 arm after a breast augmentation? What can I do?

There are many possible causes of this. You should be examined by your plastic surgeon ASAP. Best of luck.

If by losing energy you mean losing strength in the arm, this could be a sign of temporary nerve weakness. There are multiple potential causes and most are temporary and self-limited, but you should be examined right away. Contact your surgeons office asap. Best of luck.

One week after having any surgery you will have depleted energy.  In the case of Breast Augmentation, nerve pain or weakness in the arms is from the way the patient is positioned during surgery. In some cases the patient will have discomfort in the lower back area as well.  This will gradually dissipate over the next week or so. With all this bring said, make sure you bring this issues to your surgeon's attention as he will need to evaluate you in person.All the best to you.