What could a white scaly spot be on my skin (leg) that is about 1/8 inch diameter?

Hard to say: Hi Thanks for reaching out. With your description it could be an large number of things. Without being able to see it, unfortunately I can't narrow down the list. Here is some information on common conditions: http://bit.ly/2s1B3H6 There is also a paid app called VisualDx that I use as a professional that is easy enough to use that you can almost self diagnose. Hope this helps