im 25 years old female im average height weight 60 to be exact,i have a skin condition and i have no idea what exactly it may be, i have this white patch /spots patch on the back of my knee. i have it for as long as i can remember,ive tried various of things such as bio oil , nivea q10 oil,lemon juice vitam,in e oil capsules,and nothing seems to be working,it does have a itchy sensation once in awhile ,no burns though,please help