You're at greatest risk of developing a cold sore from a lip enhancement procedure a day or two after the injection. Of course, you may be prone to getting cold sores, getting a lip filler, and having no signs of an outbreak. However, it's good practice to be careful and minimize risk. Lip fillers can cause herpes in people who already carry the virus, and injections trigger it.
Symptoms of herpes reactivation after filler injection are mainly angioedema-like swelling, erythema, local pain, and crusting, which are generally seen 24 to 48 hours after filler injection. Dr. Perry said that some lip filling procedures can cause abscesses and scars with consequent deformity of the lip. Many people have also previously introduced themselves after their lip fillers had gone wrong, including one woman who said she looked toothless after having her lips done.
Speaking to The Sun, Dr. Ross Perry, cosmetic physician at the Cosmedics skin clinic chain, said lip fillers can look great when done sympathetically with the natural shape and size of the patient's lips in relation to their face. If your lips are affected by a rash or there are residual effects, then there can be no talk of any beauty injections.