This question is less common with butt implants and with breast augmentation but does occasionally happen. In both butt and breast augmentation if patients could change one thing after their surgery they often wish they had gone bigger.
The short answer is yes you can typically go bigger. There is some limit to the initial surgery that can be done in terms of what implant your body and handle. With time the skin stretch to accommodate the new implant. That is why it is easier to place a bigger implant than you might have been able to do at the initial surgery.
Determining the best size for an individual person is always the most difficult decision. Also there is a limit to the size of butt implant that can be placed at an initial surgery, as the skin has to be able to accommodate the implant. After the skin has stretched and relaxed patients can then exchange their implants for a larger size if they desire.
The short answer is yes you can change your butt implants for larger ones. I typically make patients wait at least six months after their original surgery before exchanging the implants. This will allow all the swelling to resolve and the implants to settle before making any decisions.
There are not as many implant choices for butt implants like there is for breast implants but there are a few companies that offer larger implants. You still want to make sure the implants fit your body to minimize the risk of complications.
Most patients want to improve the appearance of their buttock but still want it to look natural and have a smooth transition.
Occasionally we will have patients that present with a visible implant after their augmentation. In these cases you may be able to see the outline of the implant in an extreme flexed position. There are several ways to improve the appearance of the augmentation. One is fat transfer, however the majority of patients that have butt implants have little fat for further augmentation and buffering of the implants.
The second option is exchanging the implant. There are different butt implants in various sizes and shapes. An implant that is wider and has a more gradual transition may give you a more natural appearance.