Stretching while asleep, 3 weeks post-op. Is this normal to do? Is it safe?

Waking up and finding that you've been stretching is not a problem. You and your implants are not that fragile. At the first post-op visit a week after surgery, if the patient can't raise her arms above her head, I have her do wall walking exercises. Augmentation/lift patients who use their arms a lot (waitresses, nurses, policewomen, etc.) go back to work toward the end of the second week. They might be a little sore but they manage. By the third week, they are fine.The thing to be concerned about would be if you had persistent or increasing pains, not the occasional zing.

Stretching during sleep should in no way jeopardize your result after surgery.  At 3 weeks you are close to being clear for all activities but check first with your surgeon. 

Stretching while sleeping at 3 weeks post op is fine as long as you do not feel pain.  If you experience any pain or uncomfortable sensations, contact your surgeon as soon as possible.  Best wishes!