It can be a hemangioma or nevus de ota. A hemangioma is a congenital benign tumour or vascular malformation of endothelial cells (the cells that line blood vessels).Females are more prone to get it. In children they mostly regress by adulthood. Mostly they improve or regress completely with time, so there is no need for specific treatment in most cases. In some specific cases where treatment is require, the mode of treatment includes external compression therapy, topical steroids , topical antiseptics like Eosin, which also has antiangiogenic properties, high dose oral corticosteroids , propranolol, vascular laser therapy and medicines like vincristine and imiquimod .
I would suggest an examination by a dermatologist to confirm the diagnosis. It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your dermatologist. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.