Photodynamic can treat nevus of bright red. Bright red nevus can choose to undergo photodynamic therapy, which utilizes special wavelengths of light to stimulate photosensitizers, destroying local skin lesions and thus achieving therapeutic effects. Since there are different clinical subtypes of nevus erythematosus (bright red type, purple-red type, etc.), which respond differently to the effect of photodynamic therapy, and there are also individual differences in patients, so whether nevus erythematosus needs photodynamic therapy or whether it needs to be combined with other treatments need to be evaluated comprehensively after consulting with a specialized doctor. After photodynamic therapy, it is necessary to take good care of the daily life, and to consult the doctor regularly to observe the recovery of the condition.