After Belotero injections, patients may experience some mild swelling, redness, and bruising at the injection sites. These side effects should subside within a few days to a week after the injections have been administered. Full effects of Belotero may take up to two weeks to be fully visible. The duration of the effects of Belotero can vary depending on the specific product used and the area of the face that was injected. Based on clinical evidence, Belotero results can last from 6 to 12 months, with some patients reporting results lasting up to 18 months. You may need to have touch-up injections to maintain results.