Red birthmarks are caused by vascular malformations or abnormal proliferation of vascular endothelial cells, and the common types are bright red nevus, strawberry hemangioma, cavernous hemangioma and so on. Most of the strawberry hemangiomas can subside on their own, while bright red nevus and cavernous hemangioma treatment is based on laser or surgery, which can generally be cured. Nevus erythematosus is composed of countless dilated capillaries in the form of flatter, seldom elevated plaques, which belongs to congenital capillary malformation. The area of the lesion can gradually increase with the growth of the body, and does not subside throughout the life, the patient can follow the doctor’s advice to use laser or photodynamic therapy. Strawberry hemangioma is a common benign tumor that grows with age and usually stops growing after half a year to one year of age and gradually disappears on its own. For those with excessive growth or large lesions, early intervention is needed. Commonly used methods include surgical excision, radiation therapy, cryotherapy, sclerotherapy injection and laser irradiation. Cavernous hemangioma, also known as venous congenital malformation, the lesions gradually increase in size within one year after birth, or gradually become smaller, but it is difficult to completely subside. It can be treated with local injection, embolization, intervention or surgery, and can also be treated with oral propranolol.