As the authors of this paper published in the Journal of Investigative Dermatology note, “Recurrent infection with herpes simplex virus is a common disease…low-intensity laser therapy mainly used for the acceleration of wound healing and in pain therapy has previously been shown to be of benefit in herpes zoster infections.” They report on the results of their double-blind placebo-controlled trial that evaluated the effect of laser therapy (like what we use here) in 50 patients with recurrent perioral herpes simplex infection: “In conclusion, we demonstrated that a total of 10 irradiations with low-intensity laser therapy significantly lowers the incidence of local recurrence of herpes simplex infection.”