BACKGROUND Hemangioma is a vascular benign tumour of endothelial origin. It appears commonly in the first decade of life with increases incidence in females. Hemangioma is not common to happen in the oral cavity and it is extremely rare to appear in the labial vestibule. CASE SUMMARY We present a case of an 11-year-old girl who complained of a painful, slowly growing mass which was consistent with the capillary hemangioma in the left mandibular vestibule. Vascular tumor such as hemangioma in the mandibular vestibule is extremely rare; hence, the clinical definitive diagnosis is very challenging. Therefore, radiographic imaging and histopathologic analysis are crucial to reach to the final diagnosis for proper management. CONCLUSION Comprehensive clinical evaluation, proper diagnostic imaging and microscopic analysis of the mass establish a precise diagnosis of the hemangioma for better management.