Hello Doctor I Am 38 Year Old Female, Dentist By

Hello Doctor I am 38 year old female, dentist by prifession. I suffered severe psoriatic eczema twovyears ago on my feet. Now am cured of it completely. From past three mobths I developed a small white patch on my neck at the center of my throat. Of late it has increased in size. There is no itchng or pain but it is visible externally. Pls help.