Vascular malformations are a vast group of congenital malformations that are present at birth and can affect any type of vessels like artery, vein, and lymphatics. These malformations can cause pain, pressure, and cosmetic annoyance as well as downturn growth and development in a child in the case of high flow. Sclerotherapy has become an important tool in the treatment of vascular malformations. However, little is known about the success rate of sclerotherapy. In this study, the efficiency of sclerotherapy in the treatment of vascular anomalies was investigated retrospectively in 36 patients treated at Patna Medical College and Hospital, Patna between May 2017 to December 2018. Results: Out of the 36 patients investigated, 94% (34) had Venous Malformations (VMs) and 6% (2) were defined as having arteriovenous malformations (AVMs). Out of all VMs cases 2(6%) VMs patients were operated. Hence 88% (32) of patients with a VMs received significant relief solely from sclerotherapy. The duration of treatment for the 6 % of the VM patients that needed a surgical procedure was prolonged by 5-7months. Sclerotherapy is an effective treatment modality for VMs with a satisfactory clinical response in 88% of cases.