Certainly you are disturbed by this response to a treatment from your doctor. Genetic backgrounds are much more important than most people realize. Hispanic, Asian, Middle Eastern and South American skin is quite sensitive, even though one would think otherwise. Cryotherapy causes a lot of inflammation and that inflammation often results in dark spots from the increased melanin production. It is the body's natural response to injury and the more pigment potential in your skin, the more reaction from injury such as cryotherapy and many lasers. Likely some continued use of triluma will help, but it's not something you want to use for a very long time. Sun protection and sun avoidance is critical to effective treatment whether that is a treatment cream or a laser-type device. It is certainly difficult to avoid exposure in sunny climates, but if your skin is repeatedly in the sun, the spots may get even worse. Get a mineral sunblock, tint with a darker makeup to help mask the white cast as needed, and be fully dedicated to protecting your skin from UV exposure (that includes in the house and in the car). Unless your skin is very dry, Colorescience makes an easy to apply powder sunscreen that you can dust on easily several times a day, and although a bit expensive, the amount in the container lasts a long while. If your treating doctor is not a board certified dermatologist, please see one who has ample experience in the cosmetic treatment of Hispanic skin. There are devices that could help that are more friendly to ethnic skin, such as pico second lasers, but there's nothing that is a guarantee.