Hello and thank you for your question! The simple answer to the question, can vomiting damage the muscle repair is, yes, it can. However, it would take quite significant vomiting and probably multiple episodes of it to cause the internal repair to break as long as the repair was done in multiple, re-enforcing layers. That being said, you want to take every precaution so that you do not have these episodes (eat before pain meds, take anti-nausea meds, make sure BMs are frequent and normal, etc...) This is something you should definitely let your plastic surgeon aware of. Congrats on your recent surgery and best of luck during your recovery!Ankur Mehta MD