Lichen planus is caused by a fungal infection that may lead to skin abnormalities, rashes, and itching. Significant reduction and disappearance of the above symptoms can be considered as clinical cure. The cause of lichen planus is relatively clear, as a disease caused by Malassezia infection. Malassezia invades the skin and may cause superficial infection, the most common symptom is skin abnormality, with the further development of the disease, the neighboring lesions may merge into a piece, and there may be hypo-pigmentation, deepening of pigmentation, itching and other manifestations. After the treatment of lichen planus, the itching stops, and the dot-like and round-shaped patches disappear, which may be a sign that the disease has been cured; you can also go to the dermatology department of the hospital for examination, for example, microscopic examination of the skin flakes, observing the presence of spores or mycelium, and if there are no spores or mycelium, it means that the disease has been completely cured. If the symptoms of lichen planus, such as lesions, itching and other symptoms persist, but also in the dermatologist under the guidance of reasonable use of medication.