Brownish blue nevus can be treated by intense pulsed light or Q-switched emerald laser, with the effect varying from person to person, and it usually takes 4~5 consecutive treatments to disappear. In addition, patients should avoid sunlight in daily life to prevent recurrence. 1. Brownish-blue nevus occurs in the zygomatic area, clinically not uncommon, its etiology is still unclear, some patients have a family history of the disease, manifested as a soybean size varying round or oval brownish-blue spots of varying shades, part of the fusion can be a small piece of the lesion, the lesion has no self-awareness of the symptoms. 2. At present, there is no effective treatment for this disease, and it can be treated by intense pulsed light or Q-switched emerald laser, the effect varies from person to person, and it usually takes 4-5 consecutive treatments for it to disappear. 3. In addition, patients with brown nevus can take vitamin C orally as prescribed by doctor, and should pay attention to avoiding sunshine and friction and other stimuli in daily life, so as to prevent recurrence of the disease. It is recommended that patients with brownish blue nevus should go to the dermatology department of regular hospitals for consultation and laser treatment by professional doctors.