The number of treatments required depends on your Fitzpatrick skin type. This classifies your skin based on your skin color, sun sensitivity, and tanning tendency.Pale or white skin that burns easily and rarely tans (Fitzpatrick type 1 and 2) 4-6 treatments every 4-6 weeks, people with dark hair can usually achieve permanent hair removal. People with gray hair can only achieve permanent hair removal. After the initial treatment, they may need 6-12 treatments per month.Light brown skin, occasionally burns and gradually tans to light brown (type 3) 6-10 treatments every 4-6 weeks, people with dark hair can usually achieve permanent hair removal. People with gray hair can usually only achieve permanent hair removal. After the initial course of treatment, they may need 3-6 follow-up treatments per month.Moderate brown to dark brown skin, rarely burns and tans (types 4 and 5) 6-10 treatments every 4-6 weeks, people with dark hair can usually achieve permanent hair removal. Maintenance usually requires 3-6 months to repeat the treatment. People with light-colored hair are less likely to respond.The interval between retreatments must be far enough to allow the growth of new hair to reach the level of the bulge.