A patient may not be a good candidate for breast augmentation if the surgery cannot be done safely or if the expected result is unlikely to meet the goal. Examples include uncontrolled medical problems, high anesthesia risk, active infection, untreated breast masses or abnormal breast imaging, pregnancy or early breastfeeding, nicotine use that cannot be stopped, bleeding disorders, or medications that cannot safely be paused. There are also aesthetic and expectation-related reasons. Very thin tissue, severe sagging that needs a lift, major asymmetry, choosing an implant size that is too large for the chest, or unrealistic expectations can all make augmentation alone the wrong operation. The decision is usually made after an in-person exam, review of medical history, breast measurements, and any needed clearance or imaging. Sometimes the answer is not “no surgery,” but a different plan or delaying surgery until health and expectations are optimized.