I always recommend my patients wear their sports bra for two months, day and night after their surgery. However, you should follow your surgeon's advice regarding wearing your sports bra after your breast augmentation surgery.
Hello and thank you for your question. Each surgeon has their own thought process around the need (or not) to wear a bra post op. I would recommend that you ask your Plastic Surgeon for his/her recommendation. That being said, I see little benefit to wearing a bra at night at 3 months post op. Some patients do feel more comfortable wearing a bra at night, and if you do, that is perfectly acceptable.
This is a question to be addressed to your own surgeon. I personally don't see any benefit in wearing the bra at night.