What age, breed and weight is your girl?
How long has she had these bald spots?
Do they itch?
I am sorry your girl has this trouble.
There are many reasons for bald spots.
Ringworm, dry skin, mange, granuoma, etc.
You can see some here:
Try using selsun blue shampoo and then applying plain neosporin to the bald spots.
If they dont clear up do a skin scrape to pinpoint the culprit.
I hope she feels better very soon/
Best wishes for her,