Following injection, you may experience slight redness, swelling or bruising at the injected area. Your medical practitioner must advise on this. Please be assured that these side effects should not last and, after waiting 12 hours following treatment, can be easily covered up with your usual makeup. However, do not hesitate to get in touch with your medical practitioner in the unlikely event that these reactions last longer than a week or if you experience other side effects. All skin injection procedures carry a small risk of infection.