A birthmark can be red or brown. A red birthmark made up of dilated blood vessels is known as a Nevus Flameus. Although they can resolve spontaneously, some can cause deformities and become more purple in color. With the advent of laser treatment, the Nevus Flameus can be cleared and subsequent deformities prevented.

A Nevus of Ota, Nevus of Ito and Mongolian spot are brown to bluish birthmarks that usually occur around the eye, shoulder and trunk respectively. Given their size and location patients often consider them cosmetically unacceptable. With the Hoya ConBio Medlite Q-switched laser these birthmarks can be treated effectively with excellent results.