Lobular capillary hemangiomas, also known as pyogenic granulomas, are rapidly growing, usually single, benign vascular growths. The etiology is unknown. These lesions may arise within other vascular malformations, such as larger hemangiomas or superficial telangiectases. Trauma may also precipitate these lesions. When more than one pyogenic granuloma is present, they may be clustered together, or agminated.

They can bleed profusely after even minor trauma. While they can occur in patients aged younger than 6 months, they generally occur in older children. A 2004 study reported an average age of 5.9 years. Lobular capillary hemangiomas comprise 0.5% of all skin nodules in children.