The authors present their experience in treating congenital venous malformations with ultrasound (US)-guided endovenous diode laser. Six patients underwent treatment of eight venous malformations for complaints including pain, activity limitation, or cosmetic defect. At a mean follow-up interval of 14.5 months, all had either resolution of (five patients) or marked decrease in (one patient) pain, allowing them to resume previously limited activities. There were no instances of nerve damage or skin necrosis. One patient had a self-limited mucosal tongue base ulcer. In this small series of patients, endovenous laser treatment of venous malformations was effective during short-term follow-up.