Lichen planus, or lichen planus furfur, is mainly manifested as a punctate rash, which gradually grows and merges into a patch. Tinea versicolor is mainly a fungal skin infection caused by Malassezia violating the keratin of the skin, and the patients usually have pore-centered, clear boundary pitting rash, which is mostly brown, yellowish, white, etc.. With the aggravation of the disease, the pitting rash will gradually form the size of the nail cap irregular flaky rash, and the lesions can be covered with scales. In addition, the color of pemphigus foliaceus lesions is related to the patient’s skin color and sun exposure and other factors, fair-skinned patients with pemphigus foliaceus or less sun exposure, the general color of the lesions is darker. Patients with darker skin or less sun exposure have lighter colored lesions. If the patient has the above symptoms, it is recommended to go to the hospital for consultation to clarify the cause of the disease.