Mental retardation - multiple nevi type refers to a form of intellectual disability that is characterized mainly by below-average mental ability, and permanent marks on the skin, similar to moles, called nevi. Though most of the nevi do not cause any harm, they do increase the chance of developing cancer cells in the skin. Thus, individuals with this form of intellectual disability often have a variety of problems related to the skin. Like other individuals with intellectual disability, an individual with this condition often has problems with reasoning and solving problems, as well as performing day-to-day tasks. The condition is often diagnosed during childhood. Doctors diagnose this form of intellectual disability if skin problems are also observed. Signs like walking and talking late, slow mastering of basic tasks, and having difficulty remembering things may also suggest this condition in children. Treatment is based on a case-by-case basis and depends on the specific needs of the patient. Dermatologists may suggest surgery to to remove certain nevi. Doctors seek help from various therapists and community services to provide support and care for families affected by intellectual disability.