The growth of a hemangioma on the finger of a small child may be related to heredity, improper care factors during pregnancy, trauma and other reasons. 1. Heredity: if there is a family genetic history, the probability of a small child having a hemangioma on the finger will increase. 2. Improper care during pregnancy: if you receive a lot of radiation or leather, paint, etc. during pregnancy, it may cause abnormal proliferation of blood vessels in the fetus, and a hemangioma may grow on the finger. 3. Trauma: when the finger is injured by trauma and other vascular injuries, abnormal proliferation of blood vessels may occur and hemangioma may appear. Parents are suggested to take their children to the hospital in time to get a clear diagnosis and carry out standardized treatment under the guidance of doctors.