<P> The cause is unknown, but it may be partly a genetic trait . Aging and environmental factors may also contribute to the appearance . </P> <P> It is a relatively common condition, with an estimated prevalence of 6.8%--11% . Males are more commonly affected . The condition may be seen at any age, but generally affects older people more frequently . The condition also generally becomes more accentuated with age . The prevalence of the condition increases significantly with age, occurring in 40% of the population after the age of 40 . </P>

Why do i have scars on my tongue