Also called ‘flat warts’, these are most common in humans, which are although sometimes unsightly and sometimes painful. These warts are caused by human papilloma virus (HPV). They are not sexually transmitted. Along with the lips, these warts can be found on chin, cheeks, forehead, neck, arms and hand.Person, who has developed this type of condition, should avoid picking them. This could cause inflammation, bleeding, swelling or infection. If they are small medicines and non-invasive treatments can be used. Sometimes laser treatment provides best remedy. Since most warts are the result of virus, it is important for people to be well cleaned after vising public places.