Lichen planus, also known as recessive congenital ichthyosis vulgaris, is a rare hereditary keratotic skin disease that is autosomal recessive in nature. The typical symptom is a large, dark black or brown ichthyosis covering the entire body. Most infants are born with the appearance of a CollodionBaby, with the outer layer peeling off and the skin starting to peel. In severe cases, the hard flakes may restrict movement by turning the limbs in folds, palms and feet, cracking the fingers, and gradually stiffening the joints. Ichthyosis is mainly treated with oil-based ointment applied externally, among which 10% urea ointment is more effective and can improve the appearance of the skin with long-term use, and it is even more effective if combined with hot spring baths. In addition, topical application of hydrophilic ointment formulated with 5% lactic acid or hydroxybutyric acid is also effective; oral administration of vitamin A can also improve symptoms, but long-term use can cause adverse reactions such as decalcification and hair loss. Prevention and relief of laminar ichthyosis should pay attention to the following matters in daily life: 1. Patients with laminar ichthyosis should have to consume more vitamin-containing foods in daily life, and should choose some fresh fruits and vegetables, etc. to consume. It is not advisable to eat some fishy and spicy food and seafood products. 2, in the summer, should avoid direct exposure to ultraviolet light, in the cold winter, should pay attention to prevent cold heat, avoid wind and cold and make the surface skin stimulation. Avoid the occurrence of fever or joint swelling and pharyngitis as much as possible. Once it occurs, you should actively treat the symptoms so as to avoid aggravating lichen planus. The actual fact is that you will be able to get a lot more than just a few of these. The experts point out that endocrine disorders and other conditions can trigger this disease and make it worse. 4, to prevent dry skin, especially in winter, sebaceous glands and sweat glands secretion function is poor, the skin loses nourishment easily chapped. Hot water can be applied to increase the water content of the skin. It is not advisable to bathe too often in winter and apply skin cream after bathing, which is also a preventive measure for laminar ichthyosis.