Scale rot is a bacterial infection usually caused by too high humidity and/or unsanitary conditions. What kind of bedding are you using and where does your humidity usually stay at? It doesn't sound like you've had her long enough for unsanitary conditions to be an issue.

First try wiping the spots with a wet towel and make sure it's not just something stuck to the scales. If not, then it looks like a REALLY minor bacterial thing. Swabbing it with betadine once a day until it goes away should be enough, and keep a close eye on it that it doesn't start to spread or get worse.