Hi , I have brown spots near & around the auns . In 2 months they developed & start to looks like moles . the color changed from brown to black or dark grey ,the surface become rough and the size now is bigger . when the doctor check them he tells me, they are not genital warts ,then he used liquid nitrogen to freeze them .After the freezing in 4 weeks they came back again . i don't know whats going on . seriously , I'm worried