I have had silicone breast implants for 6 years. I have lived at sea level and at an altitude of 9000 feet and have not had any issues. I have experienced crepitus, popping sensations, and gurgling sounds at the suture lines under my breasts for 2 days when lifting my arms or moving my breasts. I drove from sea level to altitude but this is nothing new for me in the past 6 years.