Our Labrador-skin issues

Question
Our lab has rounded sores with hair loss and itchiness. one of her elbow is bloody, because of scratching, and has a denseness to it compared to her other elbow.  She has been having moles that seem to be itchy also.  Sadie is 8 years old and is feeling well other than the itching.  She has an appt next week with her vet but the sores seem to be coming pretty fast.  Thank you for your answer.

Answer
I am not a veterinarian so I haven't a clue what this could be, but "rounded sores" made me think of ringworm.
http://www.dogchatforum.com/ringworm-in-dogs.htm
http://www.peteducation.com/article.cfm?articleid=471

Hopefully your vet will be able to diagnose these sores and can treat it successfully.