Saline implants don't need to be replaced until the patient decides that she is no longer satisfied with the way they look or feel. If there is a major leak, it will be obvious and the implant can be replaced. If there is a very gradual leak, this doesn't matter until the look or feel of the implant changes enough to warrant a replacement surgery. Remember that it's only water that is leaking, so if you aren't unhappy with the implants, don't worry about slow, gradual leaks. Some saline implants have problems and need to be replaced within a year, while others may last for decades.Silicone implants are a little more difficult to assess. A silicone implant may leak without any change in the size or appearance of the breast, since the silicone is still there. Many physicians feel that silicone implants don't need to be changed until the look or feel is unsatisfactory. According to the FDA, which regulates implants as well as medications, an MRI of the breasts should be performed every other year starting in year 3. An MRI can determine whether silicone has leaked outside the shell of the implant. If there is leakage on the MRI, the implants can be replaced. As with saline implants, silicone implants can have problems within a year, or may last for decades. In your specific case, it would likely be reasonable to replace your implants. If you feel air pockets, pain, etc. a revision surgery could be helpful. There's no guarantee that replacing the implants will improve the pain or rash, but it's probably worthwhile to try at this point. A board-certified plastic surgeon can evaluate you in person and help you to devise a logical plan.