Wart nevus is also called epidermal nevus and linear nevus. It is an epidermal proliferative skin disease. It may be a dominant inheritance, usually in a linear arrangement, which occurs on one side of the body. Most cases occur at birth or early childhood, which can occur in both men and women, and generally do not subside on their own. It is characterized by verrucous papillary lesions, which are pale yellow or brown, and the lesions gradually increase, often arranged in different shapes such as lines, bands or patches. Skin lesions are distributed along the limbs, reaching the limbs, and often arranged horizontally in the trunk. Skin lesions can also be bilateral and distributed in multiple lines. Generally, there are no conscious symptoms, and a few people have mild itching. Skin lesions gradually increase with age and grow slowly, but generally they can stop growing in adulthood.

At present, there is no ideal treatment for verrucous nevus. Carbon dioxide laser or liquid nitrogen cryotherapy can be performed in stages, but attention should be paid to the depth of treatment. Too deep is easy to leave scars, and too shallow may lead to recurrence. If the range is too large, skin grafting should be done after excision.