I had vein laser treatment (face), and burn below my eyes. What treatment I can do? I have a blister. (Photo)

Initially, I would recommend hydrocortisone cream (1 or 2%) to be applied several times a day and avoid exposure to the sun for 4 weeks.Once the bliser heals, hydroquinone or scar cream by Plato's Medicinals - see link below. 

Blistering can occur post laser or radiofrequency treatment of facial veins.  Usually the blistering occurs within 24 to 48 hours post treatment.  The initial treatment is topical application of a hydrocortisone ointment (1%) or even silvadenne cream.  You should follow up with your treatiing physician to see if the blisters should be left alone or opened.